tuner: increase timeout
sh: 32bits fastpath opti / one more wait state in fastpath
may fix some oscB tuning issues
synth: mod delay on release stage
ui: save manual preset when switching to preset mode
doc: english user manual update for 2.0
sh: relaxed timings for fastpath
RELEASE mode
doc: english manual fixes
Merge branch 'master' of https://github.com/gligli/p600fw
ui: don't quantize "data pot" continuous params

Continuous parameters assigned to the data pot were not adjustable in
increments smaller than CHANGE_DETECT_THRESHOLD even though the LCD
misleadingly suggested they were changing (they weren’t).