Control scheme consistency with other tools

[willhansen]

When typing in the replacement text, there are some control conventions that would be more consistent with other tools.

• <enter> -> Confirmation
• <C-u> -> Clear input
• <C-c> -> Exit tool
• \n -> Insert newline

Some others too, but these ones feel like the main ones.

Makes me wonder if there's a standard text input field plugin-type-thing out there for this sort of thing.

[acheronfail]

I love the <C-u> and <C-c> suggestions, that's something we should definitely do.

Regarding <enter>, this isn't the first suggestion (see #106).
I'm hesitant to have \n insert a newline: what if the user wishes to insert the literal characeters \ n?

As long as it's something that's fairly common and not entire unexpected I'm happy... But I don't want to compromise on functionality either.

[acheronfail]

Partially fixed (enter, <C-u> and <C-c>) in 0.16.0

[acheronfail]

Actually, reviewing this issue again, I think 0.16.0 has applied all the suggestions here, so closing this (re-open if I missed anything).