Wait, one small problem...dang.
If the text in the text box is a single string, it works perfectly, but if the user has multiple lines, the cursor doesn't return between the quotes.
For example, enter
Line1 (hard return)
Line2
Then click the "" button.
If this is a big deal, please don't spend any time on it... but if there's a quick fix, like some way to add an if statement to detect the hard return, then adjust the -1 to -2, I'm game!