Replace #26661, fix#25979
Not perfect, but usable and much better than before. Since it is quite
complex, I am not quite sure whether there would be any regression, if
any, I will fix in first time.
I have tested the related pages many times: issue list, milestone issue
list, project view, user issue list, org issue list.
Rewrite a lot of legacy strange code, remove duplicate code, remove
jquery, and make these filters reusable.
Let's forget the old code, new code affects:
* issue list open/close switch
* issue list filter (label, author, assignee)
* milestone list open/close switch
* milestone issue list filter (label, author, assignee)
* project view (label, assignee)
1. add backend support for filtering "poster" and "assignee"
* due to the limits, there is no frontend support at the moment
2. rewrite TS code without jquery, now there are 14 jQuery files left:
