button width not honored

[jameshays]

If setPadding or setEdgeInsets are called after the buttonWidth is set, the button is resized with sizeToFit.

This is the code I used to work around it.

`-(void)setPadding:(CGFloat)padding {
self.contentEdgeInsets = UIEdgeInsetsMake(0, padding, 0, padding);
[self setButtonWidth:self.buttonWidth];
}

-(void) setEdgeInsets:(UIEdgeInsets)insets
{
self.contentEdgeInsets = insets;
[self setButtonWidth:self.buttonWidth];
}
`