Replaced throttle function and fixed a few associated bugs

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2927 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7
Fixed bug with resizing bookings introduced by floating headers

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2928 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7
Updated tzurl files

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2929 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7