Start: Allow to not show start page on file open

src/Mod/Start/Gui/DlgStartPreferences.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>476</width>
-    <height>533</height>
+    <height>559</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -433,6 +433,32 @@
         </property>
        </widget>
       </item>
+      <item row="14" column="0">
+       <widget class="QLabel" name="label_13">
+        <property name="text">
+         <string>Apply on start with opening</string>
+        </property>
+       </widget>
+      </item>
+      <item row="14" column="1">
+       <widget class="Gui::PrefCheckBox" name="checkBox_3">
+        <property name="toolTip">
+         <string>If FreeCAD is started by opening a file, apply the two settings above</string>
+        </property>
+        <property name="layoutDirection">
+         <enum>Qt::RightToLeft</enum>
+        </property>
+        <property name="text">
+         <string/>
+        </property>
+        <property name="prefEntry" stdset="0">
+         <cstring>DoNotShowOnOpen</cstring>
+        </property>
+        <property name="prefPath" stdset="0">
+         <cstring>Mod/Start</cstring>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>

src/Mod/Start/Gui/DlgStartPreferencesImp.cpp

@@ -93,6 +93,7 @@ void DlgStartPreferencesImp::saveSettings()
     radioButton_2->onSave();
     checkBox_1->onSave();
     checkBox_2->onSave();
+    checkBox_3->onSave();
 }
 
 void DlgStartPreferencesImp::loadSettings()
@@ -116,6 +117,7 @@ void DlgStartPreferencesImp::loadSettings()
     radioButton_2->onRestore();
     checkBox_1->onRestore();
     checkBox_2->onRestore();
+    checkBox_3->onRestore();
 }
 
 /**

src/Mod/Start/Gui/Workbench.cpp

@@ -73,7 +73,7 @@ void StartGui::Workbench::activated()
         QByteArray utf8Title = title.toUtf8();
         QByteArray cmd;
         QTextStream str(&cmd);
-        str << "import WebGui" << endl;
+        str << "import WebGui,sys,Start" << endl;
         str << "from StartPage import StartPage" << endl;
         str << endl;
         str << "class WebPage(object):" << endl;
@@ -101,6 +101,7 @@ void StartGui::Workbench::activated()
         str << "        self.pargrp.Detach(self.webPage)" << endl;
         str << endl;
         str << "webView=WebView()" << endl;
+        str << "StartPage.checkPostOpenStartPage()" << endl;
 
         Base::Interpreter().runString(cmd);
         // Gui::Command::runCommand(Gui::Command::Gui, cmd);