[Gui] Add hidden pref to lock toolbars

When arranged vertically, the bar that allows the dragging of toolbars
can cause problems with the toolbar appearance. This adds a hidden
preference that controls whether the toolbars are movable.

src/Gui/ToolBarManager.cpp

@@ -250,6 +250,11 @@ void ToolBarManager::setup(ToolBarItem* toolBarItems)
         (*it)->hide();
         (*it)->toggleViewAction()->setVisible(false);
     }
+
+    hPref = App::GetApplication().GetUserParameter().GetGroup("BaseApp")
+        ->GetGroup("Preferences")->GetGroup("General");
+    bool lockToolBars = hPref->GetBool("LockToolBars", false);
+    setMovable(!lockToolBars);
 }
 
 void ToolBarManager::setup(ToolBarItem* item, QToolBar* toolbar) const
@@ -314,6 +319,12 @@ void ToolBarManager::restoreState() const
             toolbar->setVisible(hPref->GetBool(toolbarName.constData(), toolbar->isVisible()));
         }
     }
+
+
+    hPref = App::GetApplication().GetUserParameter().GetGroup("BaseApp")
+        ->GetGroup("Preferences")->GetGroup("General");
+    bool lockToolBars = hPref->GetBool("LockToolBars", false);
+    setMovable(!lockToolBars);
 }
 
 void ToolBarManager::retranslate() const
@@ -327,6 +338,13 @@ void ToolBarManager::retranslate() const
     }
 }
 
+void Gui::ToolBarManager::setMovable(bool moveable) const
+{
+    for (auto& tb : toolBars()) {
+        tb->setMovable(moveable);
+    }
+}
+
 QToolBar* ToolBarManager::findToolBar(const QList<QToolBar*>& toolbars, const QString& item) const
 {
     for (QList<QToolBar*>::ConstIterator it = toolbars.begin(); it != toolbars.end(); ++it) {

src/Gui/ToolBarManager.h

@@ -80,6 +80,8 @@ public:
     void restoreState() const;
     void retranslate() const;
 
+    void setMovable(bool movable) const;
+
 protected:
     void setup(ToolBarItem*, QToolBar*) const;
     /** Returns a list of all currently existing toolbars. */