REAPER v6.51+dev0307

v6.51+dev0307 - March 7 2022

* Includes feature branch: media explorer pitch detection
* Includes feature branch: media explorer user-defined tags
* Includes feature branch: improved peak building
* Includes feature branch: FX chain oversampling
* Includes feature branch: media item fixed lanes
+ Batch converter: add option to force single-threaded processing
+ Custom menus: fix menu after reset to default on macOS
+ MIDI peaks: fix under-draw issue in continuous scrolling [twtr=1499242508328443904]
+ Media explorer: add actions to sort file list by specific columns
+ Media item import: add option to allow targeting the top part of a track to insert new track(s) to receive the media
+ Media item lanes: add context menu action and mouse modifiers to play only one lane
+ Media item lanes: add mouse modifier context for fixed lane header click
+ Media item lanes: add theme color for fixed lane label when only one lane plays
+ Media item lanes: when only one lane is playing, draw peaks in other lanes faintly
+ Notation editor: allow user-provided chords (from .ReaScale files) to override default chord names [p=2534376]
+ macOS: improve return-key behavior with third-party plug-in text entry fields
# Media item lanes: create undo point after context menu actions to move lanes up or down
# Notation editor: "identify chords on editor grid" only notates chords when they change [p=2533547]