The helper functions are put into separate files under the Helpers folder.
The helper is used in OptionsWindow and SettingsWindow.
The helper sets the tab order of a widget using its row and column number in the grid layout. The tab orders are assigned first from left to right, then from top to bottom.
If in the future a different custom type of layout is used, or a container other than QTabWidget is used, then the helper functions may need to be changed.
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