fix using result of void function in opToolkit::writeCacheFile() (fixes #3302)
add unit test for opNotificationCenter (fixes #3304)
fix opNotificationCenter::setRead() should be marked as static method (refs #3304)
fix issue of cmd feature with some youtube.com urls (fixes #3305)
Revert "(refs #2478) fixed to change the flow for saving and displaying MemberProfile"

This reverts commit f84facbf5ea0f7433881b5ccfd6735763ecf61bc.