[CLC-4089] Spinners don't spin so well on Android

https://jira.ets.berkeley.edu/jira/browse/CLC-4089

Also see https://github.com/FortAwesome/Font-Awesome/commit/b04213f358fa1ed91a5d49a1c43cd2ab0a853bec
Merge pull request #2798 from christianv/CLC-4089

[CLC-4089] Spinners don't spin so well on Android