moved creating invite to contacts menu

Ignore-this: 6e92f57a2dab956af0c84802a82e1ede

Removed the button from contacts dialog and added it as menu.
Also added "Add Contact" menu item.

darcs-hash:20140905191246-c21fe-aac2e31c1217b5c5a24cd2c016b64bef4b12a746
removed problematic "new converation" button

Ignore-this: 51042beb0fb9ad4cebc33612105d90d7

This button was strange to put in the alert tab.

darcs-hash:20140905191422-c21fe-a93f9534c99c2af3552828c29f8470a1055e32ca