This makes the textbox pass the markup/text it is given to oopango immediately.
If it is invalid, a lua error will be thrown and the old text will still be
shown.
This fixes a bug where the whole wibox isn't redrawn when a textbox complains
about broken UTF8.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This makes sure that textbox.text = "foo" doesn't work at all. It was never
supposed to work anyway. Sorry that I break stuff again.
Signed-off-by: Uli Schlachter <psychon@znc.in>