Begin performance improvement
Perfomance optimization for restore content in navi tree
More rapidly
Override method from gi.overrides for more speed
Many improvements:
*fix file removing in navi tree
*save/resrore optimization for all trees
*lock saving by pickle while saving trees
*lazy load for navi trees
Merge remote-tracking branch 'remotes/upstream/gtk3' into origin/gtk3

Conflicts:
	src/foobnix/util/file_utils.py [resolved]