Some plugins ignore updates to these values if they're changed while the plugin is in a "resumed" state, resulting in incorrect tuning after a change of sample rate.

Ignore requests to change the I/O count from within processReplacing and print a warning instead; the shared memory is in use so it can't be reallocated. Add a special case to return immediately if the I/O count hasn't changed at all; this will prevent spurious warnings when the plugin is only updating the latency and should reduce unnecessary reallocations in general.

Changed according to feedback from AudioBlast. The flag used to be set most of the time, now it is only set when playback starts/stops, looping is toggled, or playback jumps around.

This was fixed for setting the initial size of the window in 8e9f74d, but I missed the resizing case.

Stops each remote plugin process spawning a console host, and seems more in line with what other hosts do.

Some plugins don't initialise it themselves, expecting it already to be
done for them, and so are liable to hang without it (e.g. TX16Wx).

Co-authored-by: Hyunjin Song <tteu.ingog@gmail.com>
Co-authored-by: Dominic Clark <mrdomclark@gmail.com>

Fixes a bug where some VSTs (e.g. Temper) would have their settings reset on project load, due to using programs as presets.