Added basic modal for FastOpen

Fixed a graphics bug where the input field in the toolbar had a wrong
height
Made the file list work again
WIP: Working first version of FastOpen
Enhanced FastOpen
Enhanced the FastOpen UX
Small improvement to the IDE list action
Enhanced the UX through changing the page title according to the open file
WIP: Enhanced support for fileadmin based projects
WIP: Save through AJAX
Enhanced the AJAX save function
Enhanced the UX
Enhanced autocomplete
Fixed a typo in the delete dialog
Enhanced the AJAX save feature
Now use an own HTML template
Some fine-tuning of the File Browser
Added support for custom favicons to better distinguish open projects
Added open project menu item in IDE
Added the favicon to the open project menu items
Enhanced editor UI
Fixed a bug where the saveFile() method is invoked twice
Fixed UI of the editor dialogs
Enhanced FastOpen for fileadmin and composer based projects
Fixed some UI bugs
Merge branch 'feature-fast-open'