ecore-evas-x: set draw_block until the window receives a configure event

ecore-evas-x: set draw_block until the window receives a configure event

Summary:
drawing a non-override window before receiving a configure event results
in an unsized window, breaking spec. it also prevents ecore-evas resize
callbacks from triggering, yielding undefined returns from functions which
attempt to get the geometry of the ecore-evas

fix T6907

Reviewers: cedric, raster

Reviewed By: cedric

Subscribers: #committers, vtorri

Tags: #efl

Maniphest Tasks: T6907

Differential Revision: https://phab.enlightenment.org/D6019

Reviewed-by: Cedric BAIL <cedric@osg.samsung.com>