Fixes current text being overwritten in server update on RTA #11741

If the server happens to update the state of the RTA while a user is
typing then the users text will be replaced by the value on the server. To fix
this the RTA should not update if the value is the same as the one
cached on the client side.

Also moves blur handling and server<->client syncronization to the
connector.

Change-Id: Ia807b1e2aa210eb881e4b9cea0870c0c5a9254b2