Updated Slovenian translation
Allow entering a frame number into the time widget

The downside to this is that we don't seek live while typing anymore:
the frame number being typed would always get overridden by timecodes.
Users have to activate the text widget (press Enter) to seek with it.

Fixes bug #684236
[SQUASH?] Be smarter/cleaner about connecting to TimeWidget signals, and seek when focusing out of the widget
[FIXUP] Allow entering a frame number into the time widget