pep8
restrict dashboard and watchlist view to respective user
Use ErrorController only if there is an error
Hide category selection of no categories exist.
Merge pull request #296 from wawe/hide-empty-categories

Hide category selection of no categories exist.
Throw error message in user import when email address is missing
Hide categories in edit form too.
Merge pull request #297 from wawe/hide-empty-categories

Hide categories in edit form too.
Allow removing tags again

This adds the possibility to instance admins to remove a tag from
proposals and pages (see #273).

This functionality has been removed in
a8e608bb17bc83a03394dad5765ed56650f76893.
Make "more tags" link relative-urls compatible
Update delegateable after untagging
Correct importexport style
Initialize welcome codes during import (Fixes hhucn/adhocracy.hhu_theme#199)
Default addresses of imported users to activated
Import and export welcome_code
Enable lamson in HHU develop configuration
Do not htmlencode text messages (adhocracy.hhu_theme#194)
Allow underscore in static page keys