Hide Script nodes in dialog box to prevent crash with pluginscript

[touilleMan]

close #15099

[vnen]

Isn't disabling all script types too much? For instance, that's the way to create a NativeScript in the tutorial. The only other option is the use the Attach Script dialog, but that requires to add it to a node and you may not always want to do that.

[touilleMan]

@vnen I wasn't sure myself about this, but @karroffel confirmed us it was ok.
Re-reading the thread, I guess we didn't mean the same thing when talking about removing scripts...

I'll open an issue for this