[Stylesheets] Fix for new settings menu (#11609)

It can probably use some more tweaks but this way it is bug free.

src/Gui/Stylesheets/Behave-dark.qss

@@ -2388,3 +2388,26 @@ Gui--UrlLabel {
     text-decoration : underline;
 }
 
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+   border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+    border-image: none 0;
+  }

src/Gui/Stylesheets/Dark-contrast.qss

@@ -2343,3 +2343,27 @@ Gui--UrlLabel {
     color : rgba(0,91,255,255); /* Deep sky blue */
     text-decoration : underline;
 }
+
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+   border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+    border-image: none 0;
+  }

src/Gui/Stylesheets/Dark-modern.qss

@@ -2716,3 +2716,27 @@ QMdiSubWindow:hover {
 QMdiSubWindow:active {
   border:2px solid @ThemeAccentColor1;
 }
+
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+ border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+  border-image: none 0;
+}

src/Gui/Stylesheets/Dark.qss

@@ -2694,3 +2694,27 @@ QMdiSubWindow:hover {
 QMdiSubWindow:active {
   border:2px solid @ThemeAccentColor1;
 }
+
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+ border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+  border-image: none 0;
+}

src/Gui/Stylesheets/Darker.qss

@@ -2701,3 +2701,26 @@ QMdiSubWindow:active {
   border:2px solid @ThemeAccentColor1;
 }
 
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+ border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+  border-image: none 0;
+}

src/Gui/Stylesheets/Light-modern.qss

@@ -2665,4 +2665,28 @@ QMdiSubWindow:hover {
 
 QMdiSubWindow:active {
   border:2px solid @ThemeAccentColor1;
-}
+}
+
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+ border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+  border-image: none 0;
+}

src/Gui/Stylesheets/Light.qss

@@ -2647,4 +2647,28 @@ QMdiSubWindow:hover {
 
 QMdiSubWindow:active {
   border:2px solid @ThemeAccentColor1;
-}
+}
+
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+ border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+  border-image: none 0;
+}
+
+QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+  border-image: none 0;
+}

src/Gui/Stylesheets/ProDark.qss

@@ -2557,3 +2557,27 @@ PREFERENCES PACKS
 Gui--Dialog--DlgSettingsGeneral > QGroupBox > QGroupBox > QTableWidget > QWidget > QPushButton {
     margin: 0px;
 }
+
+/*==================================================================================================
+Settings menu #groupsTreeView:
+==================================================================================================*/
+
+QTreeView::branch#groupsTreeView:closed:has-children:has-siblings  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:open:has-children:has-siblings  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:open:has-children:!has-siblings  {
+   border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:has-children:!has-siblings:closed  {
+    border-image: none 0;
+  }
+
+  QTreeView::branch#groupsTreeView:has-siblings:!adjoins-item  {
+    border-image: none 0;
+  }