fix margin between sys and normal msg
enhance window icons
fix ie input field
clean up stylesheet
add expand icon
add icons to expand item
gui fixes

- enable/disable video icon
- adjust window highlighting
- css clean up
fix rename field
Merge pull request #50 from sualko/expand_roster_item

Merge expandable roster
grayscale for one-side subscription
fix chat in video window
show notice if no vCard is available
add support for priorities (#48)
add close button to verification
Add hint to browser-allow-button
Add fingerprint explanation
Add hint if roster is empty
use browser input check for contact dialog
looking for username and password field (fix #47)
fix priority issue (46116a3e8d)