Remove gray background from issue/mr/milestone background

Fixes #6062 (closed)

Signed-off-by: Dmitriy Zaporozhets dmitriy.zaporozhets@gmail.com cc @skyruler @creamzy

Before

After

@dzaporozhets Why are we using .controls to float:right instead of the native pull-right? Also reran failing builds for you.

@jschatz1 sometimes float:right is not enough and you need top margin to align buttons vertically with text. So I want to standardize how we name div with buttons to the right. Its almost everywhere .controls class now

Enabled an automatic merge when the build for 367cd8ac succeeds

Canceled the automatic merge

mentioned in commit 0ee2d50e

Status changed to merged