Add existing folder feature, stubs bug fixed

I added existing folder feature, improved it to get import all levels of
folder tree not only first level, fixed switching between stubs bug.
Prefernces stubs colors fixed

i fixed bug with stub colors and also move prefernces from window to
view
Merge pull request #2 from darthkurak/master

Add existing folder feature, stubs bug fixed, preferences stubs colors fixed
Add default depth box
Fixed toolstrip cursors bug, image/folder sorting
versioning guard; add any missing default boxes when opening a document
Merge pull request #3 from darthkurak/master

Fixed toolstrip cursors bug, image/folder sorting
Fix default foot and depth box protrusion; added flag to rebuild all boxes on reload to make future corrections easier
Merge pull request #2 from conatuscreative/master

Update from conatus