Merge pull request #1866 from mahagr/master

Fix fatal error in language package installation, Remove unused grid.js file after pull #1837
Merge pull request #1872 from mahagr/master

Add new language codes, thanks svanschu (#1844)
Merge pull request #1873 from mahagr/master

Plugin links are broken in J!3.1 (related to #1536)
Merge pull request #1874 from mahagr/master

Fix #1827 and #1846
#1881 Website Field In Kunena Profile Breaks http://
Merge pull request #1882 from xillibit/k30_bugs21

#1881 Website Field In Kunena Profile Breaks http://
#1812 Automatic subscription differs between Quick reply and Reply
Fix backend css J30 height boxes
Merge pull request #1888 from 810/master-fixes

#1812 Automatic subscription differs between Quick reply and Reply
Merge pull request #1889 from 810/master-fixes-2

Fix backend css J30 height boxes
Update languages