Implement improved filtering in add app view

Merged username-removed-124398 requested to merge NicoAlt/repomaker:137-improved-filtering into master

Screen_Shot_2017-06-25_at_16.57.49

Screen_Shot_2017-06-25_at_16.58.02

Screen_Shot_2017-06-25_at_16.58.12

Non-JS Fallback

Not beautiful but working :)

Screen_Shot_2017-06-25_at_17.06.16

Edited by username-removed-124398