When textsize cookie doesn't exist, increase and decrease fail

Hello,

We had an issue where when loading a page, clicking on increase/decrease didn't work except when you clicked on normal first. We found the reason to be the cookie check failed on increase/decrease. When clicking normal, cookie is created and increase/decrease work.

So the fix was simply to check the existence of the cookie when increase/decrease is clicked and setting it via a call to tsNormal();