Add ability to change the label on "return" key

[raviada]

I love this plugin functionality. thanks for good work. I am wondering if we can add the functionality to change the "return" key labels to for example "Submit", "Search", "Done" ro whatever the custom text may be.

is it even possible?

[tlancina]

See #9, looked into this extensively and as far as I can tell, it isn't possible.

Would love to be proven wrong though! :)