Fixed issue with F12 syncing

Activated the window before getting the text view for it, otherwise the
wrong document was being modified
Fixes for F12 syncing & Unused CSS

Fixed re-tagging after dumping usage data, fixed document creation issue
Fixed F12 syncing bug where continuous sampling was always on
Fixed F12 one time sync actions
Try/Catch for COMException that might be issued if CSS usage inspection
is on while closing VS
Merge pull request #640 from mlorbetske/master

Fixed issue with F12 syncing