[Feature request] Files tab improvement

[Starlite]

1. It is quite painful to use the "files" tab if there are folders with _very_ long names. It can be even impossible to see filenames because of sub-folders. The problem can be solved by adding a pop up message with a full filename, showing up when you aim at the desired line.

2. It'll be very good to have this tab like in ktorrent - tree view with checkboxes.

[chaky]

I support this idea of using tree view with checkboxes.