Revert "Switch to QDeclarativeView"

This reverts commit 3678b5bcaf71d800b2d01e13ae17db55924b29a0.
ihavenoideawhatimdoin

ofcourseihave
Remove remaining XmppConnectivity.client refs

Fixed subject rect in conversationPage, setting presence and keep alive
interval (which was broken in an uber stupid way, good to know) no
longer requires calling xmppConnectivity.client. Added menu back to
conversations page but it's not ready yet.