numerous fixes and improvements to abstractions and help files including reworked image drawing logic, improved metronome preset ordering and updated presets throughout the demo and help files, improved icons, clean-up and optimization, beter enveloping, and more.

finished importing the remainder of new K12 module abstractions, updated GUI to reflect them, improved key press capture, reformatted GUI object menu inside K12 mode to allow for more space

fixed segfault in disis_netsend/receive just like the one in the previous commit. Also added "port" inlet to netreceive that allows on-the-fly port change.