[imp] JModelLegacy: Don't try to use "fast" count method for queries with union. Fixes #5108
[imp] reduce uneeded calls for mootools. Fixes #4888

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Introduce new function formvalidator

-Deprecate formvalidation and introduce formvalidator
-Copy the layouts standard and confirm to isis and load jQuery instead of mootools

add a deprecated msg to the log

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Changes

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