TYPO3 Core

As a first step toward improved frontend editing in TYPO3 4.3, we should move the existing frontend editing ino a system extension to preserve compatibility.

The only part that should actually move to this system extension is the "view" code from t3lib_tsfebeuserauth and tslib_cObject code for drawing edit panels and edit icons. The remaining "controller" code from t3lib_tsfebeuserauth can be refactored into a standalone controller for frontend editing.

At a later date, we'll add a new system extension with the necessary view code for the improved frontend editing.

(issue imported from #M9615)