Replaced loading code indicator with the working indicator (with newly added animated ellipsis)
Replaced other spinners
Ensure that the loading indicator is above dialog overlays.
Show loading indicators when loading.
Formatting.
Tweaks to indicator
 Made Loading indicator larger, and hide it when empty repo
Merge + formatting.
Merge pull request #1531 from arkon94/loading

Use "Working..." indicator as "Loading [code]..." indicator. Fixes #723.
Reimplement students table in React