Request feature to set background color for ST2Web

[cydergoth]

I should like to be able to set different background colors for ST2web for our different environments like dev, prod etc. to make it easier to see which on we're working in

[nzlosh]

This is an https://github.com/StackStorm/st2web request. @armab are you able to move it, I don't have the required permissions.

[amanda11]

@nzlosh Transferred