fix caching issue
removed status filter from tasklist for timetracking-filter
adapted getProjectTrack in class.timetracker.php to accept an array of
task ids
changed task filtering for timefilter in a way, that all task are listes
changed the selection box in the timetracker filter to allow multiple
values
adapted stylesheet for the selection box
small simplification of code
Merge branch 'timetrack-task-selection' into OpenID