Get the currentTitle of UIButton from the titleLabel

[rdougan]

I noticed that if I directly added a icon via SwiftIconButton Icon @IBInspectable and did not set a title, I would get an optional not found error. This was due to self.currentTitle being nil when parseIcon was executed.

I changed the code to use self.titleLabel.text, which is what the @IBInspectable sets. I also wrapped it in the guard statement so it's safer.

[segecey]

Thanks for this pr