Added Dimming when Multiple Overlays are Opened

[nathanc7278]

Fixes #36613

Added logic that dims the overlayContent (wikis, play area, skin editor,...), the leftFloatingOverlayContent (settings area), and the top toolbar when a dialogOverlay or confirm button appears on the screen. Additionally created an updateRightFloatingOverlayDim function that checks if the notification bar, login box, and now playing box is open. Dimming priority for right floating overlays: now playing > login > notification > overlayContent.

Before:

current_release.mp4

After:

fix_dim.mp4

[peppy]

The code quality here isn't break, and feels like it could fall over at any point.

[nathanc7278]

I've updated my implementation to not hard-code the overlays that are affected. The dimming logic now checks if there are any visible OverlayContainers above the current container to determine if it should dim. The dialog dimming is essentially the same, except that I use the parent container: OverlayOffsetContainer which contains the overlayContent, leftFloatingOverlayContent, and now the rightOverlayContent. I kept it this way because it would not make sense to allow the user to click other buttons during a dialog/confirm prompt. Does this approach match what you had in mind?

dim_fix.mp4