Merge branch '1.1.x' into 2.0.x

# Conflicts:
#	composer.json
#	styles/all/template/event/overall_header_head_append.html

Version 1.1.0-RC3

Compability with ABBC3 v3.2.1

Fix posts merging option.

Fix Quick nick notifications and unread post status.

Code fixes.

New fixes for JavaScript and other.

Fix loading start.

Version 1.0.2.

Version 1.0.1.