[#2835] ticket:287 Make search field bigger, add help button
[#2835] ticket:287 Use radiobuttons for searching app/project
[#2835] ticket:287 Add search comments checkbox
[#2835] ticket:287 Search results styles (with stubs for some data)
[#2835] ticket:287 Sorting controls stub
[#2835] ticket:287 Add ago_string helper
[#2835] ticket:287 Display time using ago_string helper
[#2835] ticket:287 Center radiobuttons and checkboxes
[#2835] ticket:288 Change indexing

* Don't append 'WikiPage' in title_s
* Don't append all fields into `text`
[#2835] ticket:288 Show artifact type next to title
[#2835] ticket:288 Use 'dismax' parser for wiki search, better match on title
[#2835] ticket:288 Search comments option
[#2835] ticket:288 Add `version=N` to the urls
[#2835] ticket:288 Get rid of placeholders
[#2835] ticket:288 Always use an empty string instead of None in `text` field
[#2835] ticket:288 Fix failing tests due to changes in wiki pages indexation
[#2835] ticket:288 Preserve old indexation logic for tickets
[#2835] ticket:303 Comment out help button
[#2835] ticket:303 Add option to use standard parser
[#2835] ticket:303 Append all fields into  inside the ticket's index()