Vulkan issue tracker

Catchall ticket to capture issues discovered by people when testing the vulkan renderer

1. [FXAA is broken](https://discord.com/channels/223511295431933953/223511391531827200/1529487626963521608)
Fix PR: #7639

2. [Techroom background render renders to black instead of transparent in SCPUI](https://discord.com/channels/223511295431933953/223511391531827200/1529506333924130877)
Fix PR: #7640

3. [Icon generation for SCPUI is broken, renders screenshot of SCPUI splashscreen instead of icon](https://discord.com/channels/223511295431933953/223511391531827200/1529508725566603435)
Fix PR: #7640

4. C[ut to stage briefing effect is broken in SCPUI](https://discord.com/channels/223511295431933953/223511391531827200/1529509158783553699)
Fix PR: #7640

5. Vulkan-exclusive options like hdr and rt should be hidden from the options menu in OpenGL mode
Fix PR: #7640

6. SCPUI-generated icons are upside down (check coordinate system issues)
Fix PR: #7647

7. Solaris M21 has weirdly low performance

8. [SCPUI icon coloring is off](https://discord.com/channels/223511295431933953/223511391531827200/1529575980904222936)
Fix PR: #7647

9. [Ship loadout screen renders glowpoints as black boxes](https://discord.com/channels/223511295431933953/223511391531827200/1529577633765916803)
Fix PR: #7647

10. [BTA2 final mission is overexposed in HDR](https://discord.com/channels/223511295431933953/223511391531827200/1529595756107923567)
Confirmed in HDR - need to investigate what happens in HDR with almost pure-white scenes; it's fine in SDR.

11. [Mouse controls shadows????](https://discord.com/channels/223511295431933953/223511391531827200/1529603556217458729)
See BtA 2 Icebreaker for repro

12. SCPUI loading bar flickers during mission load
Fix PR: #7647