fixed folders to sync prompt (message box): shown only if there isa change
fix for #2665: ignore local folders directly under 'Other Docs'
refactor: used dict setdefault()
fix for #2687: check for root reuse when  exit button is clicked on any page
add ahort and long app name to the list for checking if process is the DS (by name)
fix for #2722: show quota menu
fixes for #2639: support tristate checkboxes in folders to sync (for PyQt only)
undo filter for local folders (#2665) - todo: find another way...
Merge branch 'build' of https://github.com/mconstantin/nuxeo-drive into build