Support line breaks

[God-damnit-all]

The input boxes currently don't allow you to insert line breaks (newlines), not even through pasting text.

Shift+Enter should be used to insert a newline manually.

Also, while it probably doesn't matter much, sanitizing it so carriage returns are automatically stripped from newlines would be ideal.

[theJayTea]

Great feedback, thank you! I’ll implement this in a future update.