+ Linux: fix case-sensitivity bugs relating to FXChains directory [t=308645]
+ Linux: improve behavior of zero-sized fonts when created by scripts
+ ReaScript: add GetSetProjectInfo("RULER_LANE_COUNT")
+ ReaScript: correct documentation for D_FADEINLEN_AUTO/D_FADEOUTLEN_AUTO [t=308631]
+ ReaScript: support GetSetProjectInfo() RULER_LANE_GUID:X and RULER_LANE_FROM_GUID:X
+ ReaSurround: fix possible flicker on Windows when updating various parameters
+ Region manager: improve control show/hide behavior when resizing
+ Screensets: update save attributes when loading screensets
+ Theme adjuster: update with new fonts/sizing for macOS/Linux
+ Themes: fix macOS/Linux font issues on some themes
+ WALTER: report os_type=0 to themes unless rtconfig.txt sets want_os_type 1