Update 1.6.25 - GPU memory optimisation — Super Lumi Live Steam update #661664

Changes Render textures no longer leak GPU memory and are reused or disposed of much more efficiently. This has lowered the GPU memory footprint from an unstable 250 - 700MB to a more stable 150MB. The pause menu has mostly returned to its previous version. The restart level button has moved away from the bottom three quit level buttons. Also, the restart speedrun button has been moved from the pause menu to the options menu and no longer deletes the save game. Several UI text changes. Speedrun timers are no longer rendered with bloom and have been made slightly smaller and darker. Removed one of the two checkpoints that were situated very close together on 3-5 After Hours. Thanks, Marios.