xfce4-panel-plugin-wavelan: Update to version 0.5.11
This update fixes the following issues for xfce4-panel-plugin-wavelan:
- update to version 0.5.11 (this introduces compatibility with xfce 4.10)
- better compliance with panel plugin HIG
- fix transparency and put event box above its children
- Submitted by Guido Berhoerster (gberh)