Update index.php

[ras07]

was missing $ before the variable buttonCount on line 49. This didn't cause a problem (other than giving the user infinite buttons) but it results in the following message in the Apache error log:

Use of undefined constant buttonCount - assumed 'buttonCount' (this will throw an Error in a future version of PHP) in /var/www/http/index.php on line 49

[roberttidey]

Thanks. I have corrected this.

[hogwell]

This code logic that limits the number of buttons to 6 is overly strict, in my opinion.
In fact, I use 10 buttons, which used to work fine before this typo was fixed.
It should really parse the "width:10%" attributes for each button and instead check that the total doesn't exceed 100%.

[roberttidey]

I have upped the maximum user button count to 12. No specific check on widths. I think they will wrap if width is exceeded.