Update AbstractMenuContainer showEvent doc

There was event handler ``oncontextmenu`` instead of ``contextmenu`` event in the default value for ``showEvent``.
RF-13343: setupFragmentFromWidget reimplemented to use component options
access

* the old way of retrieving component options - parsing JSON was -
  replaced with using of standard RichFaces.component().options API
* methods for parsing JSON removed
RF-13278: Added a reproducing framework test
RF-13278: Fixed the failing test by specifying the tabPanel as a render target
RF-13278: Added a tabPanel@headers metacomponent to the tab panel
RF-13448: Added javadoc to the SequenceIterationStatus class
RF-13432: fix InplaceInputRendererTest by fixing typo that fails to load XHTML resource on Mojarra 2.2
RF-13248: made Deployment welcome-file-list compatible with JBoss AS and WildFly
RF-13454: upgrade WildFly used in integration tests to 8.0.0.CR1
RF-13278: AbstractTabPanel delegates to super implementation of resolveClientId method
RF-13278: Changed the tab "headers" meta-component to "header"
RF-12813: Added a test demonstrating that the disabled panel menu item's action is executed
RF-12813: Disabled the renderer decode for disabled panelmenu items
RF-13358: Added a test demonstrating that the panel menu item's action is executed when in a disabled menu or menu group
RF-13358: Checked that the menu item's parent group or menu was not disabled before decoding
fix a copy-paste error (NumberChartDataModel -> NumberChartDataModel)
RF-13252: expand @ResourceDependency for r:ajax to avoid duplicated rendering of jsf.js
RF-13314: expanded ajax.reslib resource library to particular resource
dependencies
RF-13314: expanded base-component.reslib resource library to particular resource dependencies
RF-13314: expanded message/notifyMessage resource libraries to particular resources