#10 browser - same icon for xace and esd files

[Frieder Monninger]

If a project was changed from the "old" system
description to xace, the browser shows 2 project files
- both with the same Icon. This makes it rather
difficult to select the right one - and the danger
exists that one opens accidentially the old esd file -
the "wrong" one.

Suggestion - wither display also the extension (may be
difficult) or use a new icon for the xace file (maybe
the same icon, but green).