Implement text update on button component

[jfilipedias]

Call setText function on update on button component to change the text.

[kylebakerio]

would be nice if this were accepted. Is this project dead?

(edit to add: was contacted by developers on the project--it isn't dead, there's just an upcoming release that's in the works holding back merges for now).

[levexis]

Looks like there are some nice improvements being worked on, like rounded panels and use of a text component.