Make Custom Map Settings Savable

[gooroo7]

TL;DR
Add the ability to save custom map settings as a preset

Full Suggestion
I believe making custom map settings savable would be a really nice feature. There could be a button next to "Generate" that says "Save Settings". When clicked, it asks for a name and then your custom map settings gets added to the preset list. It seems (at least from the outside) that this would be pretty easy to implement since the preset list is already in a scrollable list format.