[FIX] tablesorter: fix function to calculate max rows and dropdown list of number of rows that can be shown for the pager and move to the abstract class; change global maxRecords default from 24 to 25 so that it multiplies in nice round numbers for the pager dropdown; hide table until finished rendering (slightly better); and other minor fixes.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@46580 b456876b-0849-0410-b77d-98878d47e9d5