Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  3f44063043afc3d67aa19ff43eeeed61db610ef1

Notificationupdate

Adapted to updated Echo extension
set icons in Echo hook
removed unused icon css file
changed msg-keys to fit new echo extension
generated json files
removed unused messages
added gender support

Change-Id: Ic6d4876f06d3bcad79f6cff2e9a89100bea90215