enhancement
(User-visible)
Dialogs should (as an option) be able to be closed not only by clicking the "x" button, but also simply by clicking on the background.
Implementation
The tl:MainLayout has been given a configuration option, closeDialogOnBackgroundClick, which controls whether dialogs with a "Close" button can be closed by clicking on the background.
Test
Open a dialog with a "Close" button and close it by clicking on the background. Dialogs without a "Close" button should not offer this functionality.