Search type filter: limit types to main types.
Merge pull request #419 from 4teamwork/pg_search_filter_types

Search type filter: limit types to main types.
AdvancedSearch: Fixed bug which renders the wrong widget for first request.

Since the filing number splitting, the very first requests of the advancedsearch form, renders the wrong widget for the fiels.
As a consequence, that all the javascript (hiding fields etc.) does not work.
Merge pull request #420 from 4teamwork/pg_advanced_search

AdvancedSearch: Fixed bug which renders the wrong widget for first request
Made logout overlay easier to customize.
Merge pull request #421 from 4teamwork/pg_logout_overlay

Made logout overlay easier to customize.
Added option to checkin documents without comment.