Hide Player Settings when in Skin Editor

[zacwm]

Now that the player settings overlays over the player, instead of moving around items (see before).

This now hides the player settings when in the skin editor, to prevent overlaying what the user is trying to edit.

Before #30749

osu._Huyuo6oGc5.mp4

(I didn't know this until recording, but the player settings were unusable in the skin editor anyways)

After #30749

osu._MYLiUXIfdW.mp4

After This PR

osu._4c13n6MsFM.mp4

I'll admit, I have a feeling it's not best practice in this repo to add a new PlayerConfiguration property for this. I'll watch and learn if there's changes.

[bdach]

This PR only says what it says it does if you push an EndlessPlayer, which happens only when opening the skin editor from main menu. It does not work when you manually enter a ReplayPlayer and then open the skin editor.

Just based off that alone I'd say that this PR is not salvageable and thus does not warrant further review, so I see little point in keeping it open.