widget/entry: Update show region geometry when entry is resized
It fixes the following problems.
- elm_widget_show_region_set() could be called from
inside of elm_widget_show_region_set(). And the last function call
could be ignored and given values were abandoned.
The patch updates show region values everytime.
- When elm_entry is resized during processing elm_widget_show_region_set(),
it must update its show region geometry to show proper region according to
lastest geometry.
The patch will show proper region of elm_entry's cursor.
@tizen_fix
Change-Id: Ia92a5232cfd26aa98075cdb9e4b54d376d1c44b7