Order of groups in AudioProcessorValueTreeState::ParameterLayout

[t0m]

Plug-in parameter groups

Hello everybody. We’ve just added support for parameter groups to the develop branch. https://github.com/WeAreROLI/JUCE/commit/7e1db1aa4f2e29776f31fa39df4fdfff5e13ca19 Hopefully the new functionality is relatively straightforward. Now, in addition to calling AudioProcessor::addParameter, you can also call AudioProcessor::addParameterGroup, which adds a nested tree of parameters and subgroups. Parameters added in this way will be ordered by a depth-first group traversal. However, there are s…