CS3/4: Add option to use button textures from PS4 version.

[AdmiralCurtiss]

Especially the PS3 ones used in CS3 are rough.

[AdmiralCurtiss]

Some of these are baked into the assets, lol, I think I understand why this happened now. Check I_WINDOW1's Arcus quick-menu for example.

[AdmiralCurtiss]

I_ICONS contains the PS4 version buttons.

[AdmiralCurtiss]

Texture summary:

• PS4 version has the button graphics in I_ICONS, mostly. I_WINDOW1 has some precomposed stuff for the ARCUS quick menu and the minimap prompt, as well as a few freestanding face buttons for placing onto the ARCUS quick menu depending on whether the button is available or not.
• PC version has the button graphics in I_DURANTE. The buttons in I_ICONS and the 'freestanding' buttons I_WINDOW1 still exist, but are seemingly unused. The precomposed I_WINDOW1 stuff has been scrubbed from the background so that the engine can place a custom prompt instead. In CS4 only, there's separate I_ICONS_BG and I_WINDOW1_BG files that completely remove the buttons from those two textures as well.

[AdmiralCurtiss]

Weirdly enough the actual I_DURANTE PS3 button texture looks pretty decently high-res, but in-game it looks quite blurry in spots, especially on the ARCUS quick menu. I'm afraid we'll have to find the button texture composition logic in the code to fix this... bleh.

[AdmiralCurtiss]

Missed this before: I_BATTLE/btl030 contains the in-battle buttons. These have not been changed between PC and PS4, but funnily enough the one in D3D11_jp in CS4 PC has Switch button textures.