[Low priority] [Visual] Menu stars background glitch when changing resolution

To replicate:
1. Change your resolution to whatever resolution smaller than your current one.
2. Change your resolution to your original resolution.

The moving stars background will either behave normally or glitch out in 2 ways(which I currently know of):
1. Stars background disappears and you are left with a clean purple background.
2. Stars background gets "windowed"  and you can see clean purple background "margin" around its edges.

Noticed on build 2017-01-10.
Present in the previous build(2017-01-08) as well.

Pictures:

issue : link