Improved visibility of origin of current file in "Open documents" view

Use case:

Assume you are working in Qt on multiple platforms at the same time. Usually this implies that you have two different checkouts of Qt which are represented by two different kits. At some stage you might want to edit the same Qt source file in the two Qt checkouts at the same time. Currently it is very difficult to see which of the two open files (with the same name) belongs to which Qt checkout/platform/kit.

Suggestion:

• Please consider adding a minor tag behind the name of the file indicating the source directory. This could be similarly done to the git [branch tag] behind a project name in the project view.

• At the very least the additional tag should be added to the entries in "Open documents" list at the bottom left and even better to the file selection combobox above the currently open editor window too.