Preparations on search topic support

Conflicts:
	components/com_kunena/site/models/search.php
KunenaForumCategory: add getNewTopicUrl() and getMarkReadUrl() calls
Convert category buttons into layouts
Missing commit on merge
Crypsis: Add a few missing buttons
Merge branches 'feature-hmvc' and 'rtv3' of github.com:mahagr/Kunena-Forum into rtv3

Conflicts:
	components/com_kunena/site/models/search.php