Patch of demo D-09: more instruments, organised settings, etc. — icosi-do Steam update #103899

Just another patch of the demo: I added three more instruments (celesta, flute, and glockenspiel). I kept the volume quite low because the high-pitched notes can be quite annoying when they are too loud. If you want to skip a musical instrument in the CYCLE of instruments but keep the cycle going, you can now achieve this by changing the setting from CYCLE to any other instrument and back to CYCLE. Speaking about SETTINGS: they are now organised in 4 submenus (MODES, VISUALS, AUDIO, and CONTROLS). Also there are a few small changes to naming and order of specific settings. There is now a SHARE LEVEL menu item in the LEVEL MENU. I don't know why that was missing. Speaking about SHARE LEVEL: the navigation when escaping/canceling any of the SHARE LEVEL menu items is now more consistent with the rest of the menu. Still speaking about SHARE LEVEL: I fixed a bug with copying a level code to t...