Sets ModeLayout when editing and turns mainbar-tools into sole entries
starting the PageEditor sets a flag (lCOPageEditGSToolProvider::SHOW_EDITOR) in GlobalScreen's context. This plugin comes with a GlobalScreen ModificationProvider reacting to this flag (and the additional activation of the plugin) to modify page's parts.
- clearing mainbar
- moving tools to mainbar-entries
- removing breadcrumbs
- removing footer
- removing metabar-entries
- using ModeInfo-component on the page to visualize editing-mode