ecore-evas/x: detect and track wm existence, apply visibility correctly

ecore-evas/x: detect and track wm existence, apply visibility correctly

Summary:
this attempts to monitor the _NET_SUPPORTING_WM_CHECK atom to verify whether
a wm exists, and bypasses waiting for a configure event from a nonexistent wm
if the screen is not currently managed

fix T7838

Depends on D10014

Reviewers: devilhorns

Reviewed By: devilhorns

Subscribers: devilhorns, thierry1970, cedric, #reviewers, #committers

Tags: #efl

Maniphest Tasks: T7838

Differential Revision: https://phab.enlightenment.org/D9900