Gui: Remove shortcuts for overlay toggles

Using these commands by mistake can result in broken interface and the
shortcuts are way too easy to hit by mistake. The feature is rarely (if
at all) used - so there is no need to have easy to hit shortcuts.

(cherry picked from commit 78a6891dae)

src/Gui/CommandView.cpp

@@ -3860,7 +3860,6 @@ StdCmdDockOverlayAll::StdCmdDockOverlayAll()
     sToolTipText = QT_TR_NOOP("Toggled overlay mode for all docked panels");
     sWhatsThis = "Std_DockOverlayAll";
     sStatusTip = sToolTipText;
-    sAccel = "F4";
     eType = 0;
 }
 
@@ -3887,7 +3886,6 @@ StdCmdDockOverlayTransparentAll::StdCmdDockOverlayTransparentAll()
     );
     sWhatsThis = "Std_DockOverlayTransparentAll";
     sStatusTip = sToolTipText;
-    sAccel = "SHIFT+F4";
     eType = 0;
 }
 
@@ -3911,7 +3909,6 @@ StdCmdDockOverlayToggle::StdCmdDockOverlayToggle()
     sToolTipText = QT_TR_NOOP("Toggles overlay mode for the docked window under the cursor");
     sWhatsThis = "Std_DockOverlayToggle";
     sStatusTip = sToolTipText;
-    sAccel = "F3";
     eType = 0;
 }
 
@@ -3938,7 +3935,6 @@ StdCmdDockOverlayToggleTransparent::StdCmdDockOverlayToggleTransparent()
     );
     sWhatsThis = "Std_DockOverlayToggleTransparent";
     sStatusTip = sToolTipText;
-    sAccel = "SHIFT+F3";
     eType = 0;
 }