Projects view displays files added by qt_add_resources() in different subtrees

Files added as resources via qt_add_resources() directly (see screenshot: green box) are shown in different subtrees of the Projects view, depending on their extensions.

The Projects view shows all .png and .jpg files under "vtss_supervisor/Resources/resources/images" (see screenshot: upper red box). Whereas all other files (.gif, .xpm, .txt, .bla) are shown under "vtss_supervisor/resources/images" (see screenshot: lower red box), although both are defined in the same qt_add_resources() call with the same path (see screenshot: green box).

Additionally, .ui and .qss files defined in this way are also shown outside the "Resources" subtree.