NetworkBrowser: - replace buttons and labels through StaticText for better skinability

NetworkBrowser: - replace buttons and labels through StaticText for better skinability
- rework gui to better fit inside e2 networkconfiguration
- dont allow "/" on beginning of a sharedirectory name to workaround double / inside mount command
- fix wrong return from mountedit screen back to networkbrowser, so we dont get again the userdialog
- clear expandet list on refresh
- more informations inside networkbrowserstatusbar
- minor fixes