modding the schema should also set collection modified

required for the force full sync case
fix modification check in note merge
include full traceback on sync error
remove dropbox image escape hack
The point of the extra object regexp is that it is called data, not src.
Merge remote-tracking branch 'frento/ospalh-special-develop' into ospalh-special-develop
Don't fail on syncs.
Treat objects and embeds like img, that is, not-draggable.
Merge remote-tracking branch 'dae/master' into flake

Conflicts:
	anki/media.py
Merge remote-tracking branch 'ospalh/flake' into ospalh-special-develop