Minor Button hover bug

Just pulled the tip and found that mouse events on drawable buttons have a small issue.

The images on the buttons seem to be getting mouseEnter events (and the button gets mouseExit). Clearly when hovering over the image you want the button to retain the mouse.

I verified that it’s not just some wonkiness in my code by compiling the juce demo and checking the button there - and saw the same.

Ah right, thanks! I’ll sort that out…