REAPER v6.27rc5

v6.27rc5 - April 9 2021

* Includes feature branch: media item channel mapping
+ Timeline: truncate seconds and samples display rather than rounding, for consistency with H:M:S and H:M:S:F display
# FX: do not apply visibility/floating/docked values on undo/redo when new fx close option is set
# Timeline: fix timeline display when scrolled away from project time zero (rc3 regression)
# Timeline: in H:M:S and H:M:S:F modes, when project start offset exists, display labels for sub-second intervals as secondary