Show assigned issues/mr be default on dashboard

This was default before but now it fixed with providing assignee_id
parameter making url shareble and dont reset when other filters users.

Also this commit removes old methods that are not used any more.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'dashboard-fix-assignee' into 'master'

Dashboard: fix assignee filter and remove some old code

See merge request !1354
Improve UI for group milestone and project milestone pages

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Dont check for milestone description on group milestone page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'fix-ui-milestone' into 'master'

Improve UI for milestone pages

See merge request !1356