Extending UI.Button for better mobile experience

I was struggling with annoying user experience for button clicks on iOS. Not sure if others are experiencing this, but I was finding that some of my buttons were not clicking properly. I determined that this was likely due to the user (ie: me) sliding a bit off the button such that the PointerUp event was falling off the button, preventing OnClick from firing. At least, I'm assuming that this is the sequence of events that UI.Button follows.

Anyways, I decided that for certain buttons...

Extending UI.Button for better mobile experience