add search to mobile user page
add clear btn to user search
show loading gif when user submits a search query
add link to help info for mobile users search
only show the user search bar if the project has more than 0 users
Merge branch 'master' into user-search
don't return deleted users when searching; allow deleted user changes to propogate to the user es index
remove accidentally included keymaster.min.js
Merge pull request #1632 from dimagi/user-search

add search to mobile user page