Improve resizing

[izzyreal]

On macOS there are at least these 2 issues:

1. The LCD screen is essentially pixel art. JUCE's resampling algorithms give interference patterns at quite a few scale factors.
2. When resizing, the slider, datawheel and knob components wobble. See https://www.youtube.com/watch?v=r-dSUd-Q0tw.

Maybe 1 could be resolved by using https://github.com/avaneev/avir, for which a JUCE wrapper exists.

I suspect 2 could be resolved by improving ContentComponent::resized.

Also investigate resizing on Windows and Linux and see what needs to be improved.

[izzyreal]

For the LCD part I got something that works on https://github.com/izzyreal/vmpc-juce/tree/avir-lcd but I'm not sure whether to merge it in. Performance difference shoud be profiled.