Steps to Reproduce

1. if a framework loads a different version of jquery prior to ZK, then ZK overrides $ will cause the other framework to work incorrectly.
Please refer to KEIKAI-220.

Current Result

• ZK always overrides $
• ZK remove $.noConflict(). So users can't return control of $ back to the other framework.

Expected Result

ZK doesn't override $.

Debug Information

• in the previous version, zk jquery checks before overriding jQuery.
• Previously, we customize jquery.js to avoid overriding $. * it's better not to fix this bug by modifying jquery itself because we might forget to migrate such customization in the future when upgrading jquery version. Like this time.
• noGlobal is an internal parameter, we can't set it from outside
• if zk sometimes overrides $ and sometimes doesn't, then it's risky that zk widgets use $. ZK widgets should all use jq since $ might reference to another version of jquery.

Workaround

apply jquery.src.js
But this js workaround only works for Keikai 5.1.1 and will fail a zul page, so users can only load a JSF page. Besides, It doesn't work for keikai 5.2.0 for it registers functions on jQuery.