Initial support for NSO applet (by ELY3M)

[ShadowOne333]

Based on the fork by @ELY3M mentioned in issue #73.
This should add standard support for editing and dumping the NSO applet.

Needs extra work (according to ELY3M) to be able to change the background color of the icon.

[exelix11]

It doesn't seem to add much aside from some needed definitions and from what i understand it doesn't actually work.
I'm not currently interested in developing new features, i'm closing this unless you're actually willing to finish implementing it.

[ELY3M]

actually, it is working for me. I have to do tweaking with layout json and stuff. I ended up using black background and it look better on my switch. this is one way to get rid of red background is this layout json at https://pastebin.com/c3HFRRQS

[ELY3M]

here is layout json with all black background. I am using this layout right now.
https://pastebin.com/4JhN3UGV

[exelix11]

Are you sure there is no way of to make it look like the other buttons like by copying over the properties ? Maybe the code behind doesn't theme it at all so it is impossible, idk.
Changing all of them so they match feels hacky and probably breaks the system color "themes".