#JC-2020:Fixed remarks from QA:
*Choice of Subscribe/Unsubscribe link depends of current user subscription state
*Upvote and Downvote buttons bow has no projections on triangle side
#JC-2020:Fixed issue with splitting long strings in questions
JC-1993: Now 'Sign In' style for /login page and a dialog window is the
same.
#JC-2058: Fixed.
@NotBlank and @Size annotation assembled in one custom annotation to provide correct error message
#JC-2058:Corrected grammar mistake in validation message
Merge remote-tracking branch 'upstream/master'