WIP: clutter/stage: Restart from beginning if redraws are added mid-iteration
This prevents the iterator from getting invalidated and iteration aborting prematurely:
iter_remove_or_steal: assertion 'ri->version == ri->hash_table->version' failed
g_hash_table_iter_next: assertion 'ri->version == ri->hash_table->version' failed
Fixes: #1557 (closed)
Edited by Daniel van Vugt