move xwayland socket connection to its own thread

move xwayland socket connection to its own thread

this operation performs a synchronous socket connection inside xlib which can
block for an infinite amount of time. in order to avoid having a potentially
unlimited amount of time where the ui is frozen and polling on the socket connection,
move it to a thread where it can hang for as long as it wants and then use the
resulting display object for the ecore-x connection