Merge pull request #1800 from mahagr/master

Fix #1799, #1787, #1732
#1802

User Manager > tool tips: Enabled users will displayed as blocked and
vice versa
#1804 User manager: You cannot delete users
Merge pull request #1803 from 810/bugs1

#1802 User Manager > tool tips: Enabled users will displayed as blocked and
 #1804 User manager: You cannot delete users
Merge pull request #1806 from xillibit/k30_bugs10

#1804 User manager: You cannot delete users