Improve presentation changelist

* Add filters
* Add search
* Enable sorting on number column (other columns already enabled)
Merge branch 'develop' into feature/65-better-presentation-changelist
Merge branch 'develop' into feature/65-better-presentation-changelist
Display `kind` column in admin for proposal kind
Merge pull request #65 from caktus/feature/65-better-presentation-changelist

Presentation changelist - add sorting and filtering