Addon Manager: Refactor primary view and enable composite (#12693)

* Addon Manager: Refactor primary view and enable composite

This brings back something akin to the original Addon Manager display, with the side-by-side display of the list and details views.

src/Mod/AddonManager/Widgets/addonmanager_widget_addon_buttons.py

@@ -75,6 +75,8 @@ class WidgetAddonButtons(QtWidgets.QWidget):
         self.retranslateUi(None)
 
     def _setup_ui(self):
+        if self.layout():
+            self.setLayout(None)  # TODO: Check this
         self.horizontal_layout = QtWidgets.QHBoxLayout()
         self.horizontal_layout.setContentsMargins(0, 0, 0, 0)
         self.back = QtWidgets.QToolButton(self)
@@ -98,6 +100,9 @@ class WidgetAddonButtons(QtWidgets.QWidget):
         self.horizontal_layout.addWidget(self.change_branch)
         self.setLayout(self.horizontal_layout)
 
+    def set_show_back_button(self, show: bool) -> None:
+        self.back.setVisible(show)
+
     def _set_icons(self):
         self.back.setIcon(QtGui.QIcon.fromTheme("back", QtGui.QIcon(":/icons/button_left.svg")))
 

src/Mod/AddonManager/Widgets/addonmanager_widget_package_details_view.py

@@ -65,6 +65,7 @@ class MessageType(Enum):
 
 @dataclass
 class UpdateInformation:
+    unchecked: bool = True
     check_in_progress: bool = False
     update_available: bool = False
     detached_head: bool = False
@@ -112,6 +113,7 @@ class PackageDetailsView(QtWidgets.QWidget):
         self.vertical_layout.addWidget(self.message_label)
         self.vertical_layout.addWidget(self.location_label)
         self.vertical_layout.addWidget(self.readme_browser)
+        self.button_bar.hide()  # Start with no bar
 
     def set_location(self, location: Optional[str]):
         if location is not None:
@@ -274,6 +276,8 @@ class PackageDetailsView(QtWidgets.QWidget):
     def _get_update_status_string(self) -> str:
         if self.update_info.check_in_progress:
             return translate("AddonsInstaller", "Update check in progress") + "."
+        elif self.update_info.unchecked:
+            return ""
         if self.update_info.detached_head:
             return (
                 translate(

src/Mod/AddonManager/Widgets/addonmanager_widget_readme_browser.py

@@ -63,6 +63,7 @@ class WidgetReadmeBrowser(QtWidgets.QTextBrowser):
     def setMarkdown(self, md: str):
         """Provides an optional fallback to the markdown library for older versions of Qt (prior to 5.15) that did not
         have native markdown support. Lacking that, plaintext is displayed."""
+        geometry = self.geometry()
         if hasattr(super(), "setMarkdown"):
             super().setMarkdown(md)
         else:
@@ -76,6 +77,7 @@ class WidgetReadmeBrowser(QtWidgets.QTextBrowser):
                 FreeCAD.Console.Warning(
                     "Qt < 5.15 and no `import markdown` -- falling back to plain text display\n"
                 )
+        self.setGeometry(geometry)
 
     def set_resource(self, resource_url: str, image: Optional[QtGui.QImage]):
         """Once a resource has been fetched (or the fetch has failed), this method should be used to inform the widget

src/Mod/AddonManager/Widgets/addonmanager_widget_view_selector.py

@@ -119,7 +119,6 @@ class WidgetViewSelector(QtWidgets.QWidget):
         self.composite_button.setIcon(
             QtGui.QIcon.fromTheme("composite_button", QtGui.QIcon(":/icons/composite_view.svg"))
         )
-        self.composite_button.hide()  # TODO: Implement this view
 
         self.horizontal_layout.addWidget(self.compact_button)
         self.horizontal_layout.addWidget(self.expanded_button)