- fixed a crash when creating a Document object due of changes in Qt6 (missing QtGui.Qt)

- in Document object fixed the issue with not setting selection color when in a dark theme (essentially got rid of using QPalette)
- in dark theme stylesheet changed the indent of the QCheckBox (and in Radio buttons too)
- updated the FClabel widget with some more properties
- updated the hack to make sure that the Editor sub-tools do not lose the stylesheet of the background
- updated the disabled project item color default value for the dark theme

appGUI/themes/dark_style_sheet.py

@@ -114,7 +114,7 @@ QRadioButton:hover {
 }
 QCheckBox::indicator,
 QRadioButton::indicator {
-    margin: 0 0 2 10;
+    margin: 0 0 2 0;
     height: 18px;
     width: 18px;
 }