Updated Japanese translation
Sort tags alphabetically
Fixed check on upload permissions
Prepare release
2.8.3 -> 2.8.4
Updated Chinese (Traditional) translation
Added check on uploaded files
Added missing PMF_ROOT_DIR
Sort tags
Fixed sorting of tags, finally
Fixed issue with broken URLs in pagnation, closes #773
Avoid hardcoded http URLs for redirects (#772)
Merge branch '2.8' of into 2.9
Removed Ajax File and Image Manager (#774)