This expands significantly the maximum number of Beats that can be represented, which is a good
thing in itself. It slightly speeds up some Beats::operator methods, and slightly slows down
::get_beats() and ::get_ticks().
One minor change in an API user was required, and several tweaks to the unit tests due to the
macros being used by cppunit creating possible type confusion.
Units test pass
Consistently use Tertiary for Group Override on all platforms (and be consistent about it)
Consistently use Primary-mod for Momentary on all platforms (partially reverts 47932f)
Primary modifier is used for fine-adjust on knobs and sliders, with no analogous operation on switches.
The pre-nutemo code used fmod() to calculate the offset into the bar:
`bar_fract = fmod (barbeat, 1.0); // fraction of bar elapsed`
with nutempo, beats start at 1, and the tick offset must also be
taken into account.
The bug was introduced in f67029bd0
PortIndex is sorted by name, and uses port-name as unique identifier.
Ports can be re-named concurrently with processing.
::set_port_name() updates the RCU in the background. The engine
may concurrently process with an old RCU reader value.
In this case valid_port() failed in the process-callback.
and ::get_buffer() returned NULL
is_button2_event() was used to detect the user's desire for a
momentary-click on some buttons (mute, solo, mixer scenes)
is_momentary_push_event() disambiguates this action from is_button2_event()
for the special case of momentary, we can drop the workarounds for
the lack of middle-mouse buttons on Mac, and instead just use
shift+left-click on all platforms.
