Port to libhandy 1
This ports Calls to libhandy 1, drops the embedded HdyAvatar in favor of the libhandy one, and uses HdyViewSwitcherTitle to simplify the code a bit.
This ports Calls to libhandy 1, drops the embedded HdyAvatar in favor of the libhandy one, and uses HdyViewSwitcherTitle to simplify the code a bit.