Brings some UI tweaks, encryption indicator that is bound to calls
`encrypted` property, fixes a small issue with libcallaudio usage and
lots of updated or added translations.
Closes#452
We already had our mapping between CallsCallStates and CuiCallStates in place,
but the _DIALING state got renamed to _CALLING.
Additionally bundle CallsCallStates that map to the same CuiCallState to remove
some code.