This fixes a recursive resizeView()->onSize()->resizeView() loop in Arturia Pigments as it immediately calls resizeView() with the same size.

This fixes a crash in Roland Cloud plug-ins due to calling methods on the IMidiMapping interface before it was initialised.

Previously, updating the program or bypass parameter could cause an
out-of-bounds access into the parameter value cache. This is because
AudioProcessorParameter::getParameterIndex() was used to index into the
cache, but the parameter index could be negative for parameters that
had not been added to the AudioProcessor.

We now use the appropriate index in the cache for parameters that
have not been added to the AudioProcessor.

This fixes a bug when creating a TextLayout with whitespace at the start of lines.