tree c4baaed4ad276ef82b0175ff5dc1f1cccd51a882
parent 7137e57d34b54a2460a7f9f4eba53f133cf5b57f
author Stephen Li <stephenli@google.com> 1520878601 -0700
committer Stephen Li <stephenli@google.com> 1520884888 -0700

Disable button after click in UI.

This is to prevent users from accidentally sending multiple requests to
the server, causing race issues. It won't completely solve the problem,
as multiple users could still potentially hit the button at the same
time, but should mitigate it in the vast majority of cases.

Change-Id: Icd0bdf4a92aad2b28ab3333c7e0eb06f6291b262