Make it a settings option to allow feedback

[geikha]

I've been using Element as a replacement for FL Studio's Patcher, and I got it to do feedback sometimes (which Patcher cannot), however I just realized these are just exceptions where I accidentally got Element to allow feedback via god-knows-how (I think one the feedback happens too later down the line it doesn't detect?). FL Studio users that are into audio synthesis are always frustrated with the DAW and Patcher for not allowing audio feedback, which enables the creation of custom delays, resonances and some experimental synthesis techniques. I wonder if this could be added as a feature instead of an error to be avoided!