Change path for local banks/presets

[Xeno-Idaltu]

ZynFusion only reads presets if their path is in the main directory. My desktop is cluttered and not having the option to have presets located in a more organized way is very annoying.

A good solution is to automatically create a hidden /home/$USER/.zynaddsubfx/bank directory so we know where to put our presets and at the same time it's hidden. But the best option is to have them stored in /home/$USER/.local/share/zynaddsubfx/bank

BTW ZynFusion lacks Nio Settings. We can't get Jack to use our midi keyboards because there's no menu..

[fundamental]

Per the Nio Settings, it's my understanding that the vast majority of users end up using the .desktop files which launch the system with flags. e.g. zynaddsubfx -I jack -O jack for jack audio output and jack midi input.