Accessible ui select

[``* `#17790` #17790``](http://community.openproject.org/work_packages/17790)
[``* `#17787` #17787``](http://community.openproject.org/work_packages/17787)
[``* `#17789` #17789``](http://community.openproject.org/work_packages/17789)
@0xF013 did you change the branch name?