Update js/grid.base.js

Scroll automatically the grid when virtual scroll is active and a page number is set in grid's options.
See http://www.trirand.com/blog/?page_id=393/help/virtual-scroll-ajax-xml-data-go-to-page-programmatically/
Remove DateFormat from formatter and replace it with parseDate - we remove duplicate functions.
Moving the DateFormat function from formatter to parseDate
Remove not needed code from parseDate.
More changes to parseDate to to have the old behaviour when used in grid.
Comparation fixes in some function in base module.
Small fix in filteToolbar
The parse date string can now be customized. The option is parseRe in lang file.
Adding more flexible data for the search in the lang files. Now we can add what we want operations and translatins to the grds in common or in particular way.
Adding the search translated data and oper direct to the options
We should change the name of passed param for the new lang settings in searchFilter
Removing not needed params and setting in jqFilter
Added operands in searchGrid to translate the operations.Fix jqFilter to work with the new lang settings.
Fix code to work with the new lang settings
Adding options to select search operators in toolbar filter.
Comparation and other small fixes in custom module.
Adding language search options in filterTollbar
Add buildRule menu for toolbar search.
Add a event when a selection is made in the operations
Build the operator and append it near search control.