Groovebox tidy

[clone45]

A lot of under-the-hood improvements to the Voxglitch Groovebox, including:

• More efficient memory usage, especially when it comes to the delay code
• Improved slew limiting on parameter locks
• Fixed the "click" that occurred when switching memory banks
• Added a new helpful context menu to the parameter knobs to "set other knob values to this one"
• Converted a lot of arrays to std::array
• Improved how pan slew limiter is applied which fixes clicks and pops when using adjusting track pan using the expander
• Improved groovebox expander code to take advantage of onExpanderChange