Refresh draw objects when common settings change

Common settings may change colors so make sure that we refresh the draw
objects when the settings change to draw them in the proper colors.
Failing to do this may also cause left over lines on the screen
depending on OpenGL drivers

Fixes https://gitlab.com/kicad/code/kicad/issues/11921

eeschema/symbol_editor/symbol_edit_frame.cpp

@@ -1119,6 +1119,9 @@ void SYMBOL_EDIT_FRAME::CommonSettingsChanged( bool aEnvVarsChanged, bool aTextV
     GetCanvas()->GetGAL()->SetAxesColor( m_colorSettings->GetColor( LAYER_SCHEMATIC_GRID_AXES ) );
     GetCanvas()->GetGAL()->DrawGrid();
 
+    GetCanvas()->GetView()->UpdateAllItems( KIGFX::ALL );
+    GetCanvas()->Refresh();
+
     RecreateToolbars();
 
     if( aEnvVarsChanged )
@@ -1166,6 +1169,7 @@ void SYMBOL_EDIT_FRAME::RebuildView()
     GetCanvas()->GetView()->HideDrawingSheet();
     GetCanvas()->GetView()->ClearHiddenFlags();
 
+    GetCanvas()->GetView()->UpdateAllItems( KIGFX::ALL );
     GetCanvas()->Refresh();
 }