Improve ux for active comment filters

Indicate with the color red if a filter is active. Also show a message if there are no comments with the active filters.
Status Job ID Name Coverage
  Test
passed #263698
nodejs
unit_tests

00:02:42

 
  Codestyle
passed #263699
nodejs
tslint

00:01:53

 
  Build
passed #263700
angular
ngbuild

00:07:24