jsPanel v4.11.0-beta

• added method jsPanel.strToHtml(str) converting a DOMString to a DocumentFragment.
• added option opacity
• bugfix in modal extension concerning the use of onclosed callback.
• bugfix in autoposition parameter of option position.
• updated jsPanel.ajax() in order to improve its usability as general purpose AJAX tool.
  This update might require a change in your code if you use jsPanel.ajax() and/or option contentAjax.
• updated jsPanel.fetch() in order to improve its usability as general purpose Fetch tool.
  This update might require a change in your code if you use jsPanel.fetch() and/or option contentFetch.
• updated option contentAjax optionally loads only a page fragment.
• updated CSS for controlbar
• updated header title is now wrapped in a <div> instead of a <span>
• updated contextmenu extension due to changes in jsPanel.ajax().
• updated dock extension internally. Should not affect existing code.
• disabled the use of the Pointer Events API. So for now only Touch and Mouse events are used by a panels controls and dragit/resizeit interactions.