Integrate Shadow

[Adnn]

• [x] Restore pass GUI
  • [x] Use atomics
• [x] Invert the order in Pass::Visual
• [x] Fix the "light depth" viewport
  • [x] Control it via GUI
• [x] Solve the light placement
• [x] Restore text
• [x] Implement variable bias
• [x] Recompile shaders should redo VAOs