Bug 15727: Resizing the resource sidebar doesn't scale the font preview or network timeline
        http://bugs.webkit.org/show_bug.cgi?id=15727

        Add one window resize listener and call the new resize function on the currentPanel.
        Also call the currentPanel's resize function when resizing the sidebar.

        * page/inspector/DocumentPanel.js: Implement resize and call updateTreeSelection() when
          the panel is shown and when resizing the DOM sidebar.
        * page/inspector/FontPanel.js: Implement resize.
        * page/inspector/NetworkPanel.js: Ditto.
        * page/inspector/inspector.js: Add a window resize listener.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@27171 268f45cc-cd09-0410-ab3c-d52691b4dbfc