some ui tweaks to the contact list dialog

Ignore-this: 33cc9ce5a0ef3d973e8a4602a9f945d5

I put the "create invite" button next to the add button on the main dialog.
I think this simplifies the ui a little.

darcs-hash:20130331044423-c21fe-6b36a37abe2a6ffbcb8bdd573d47761b77e35329
fixed but where initially the app menu is enabled

Ignore-this: bb3775d9e2c78480ae5cc68d3313ab93

darcs-hash:20130331044543-c21fe-161432f039eaaf478e9690f759b5c1a9eae8ee9b