AutocompleteController Bind settings

[korgon]

Adding ability to opt out of either input or submit bindings in AutocompleteController via controller settings.

Example:

autocomplete: [
	{
		config: {
			id: 'autocomplete',
			selector: 'input.searchspring-ac',
			settings: {
				bind: {
					input: false
					submit: false
				}
			},
		},
	},
],

I've combined the input enter key press and form submit events into one "submit" so simplify configuration. Additionally, there are other bindings that occur for things like document click, input focus and input escape key press that I don't think are necessary to provide settings for, but could be added if we needed to.