Hack for Labels not showing up on MonoMac and MouseVisible fix

This is a hack to get around this problem for now.  Not happy with it but can not seem to find the problem.

Read comments in CCTexture.InitWithString:

// It seems that MonoGame has an initialization problem with MONOMAC
// what we are doing here is a HACK and no doubt about it.  We can take this
// work around out when the issue is addressed in MonoGame.
// The issue is that if we do not re-initialize the font for some reason it is 
// not drawing the next label if it is the same font and size.