TYPO3 Core

We now have the "Update Wizard" in the Install Tool, but it only covers a part of an "upgrade" process for TYPO3.
If you scan through http://www.infolagret.se/index.php?id=598 , you'll see how many manual steps are involved in an upgrade (from the "Start the Install Tool" part until "Check the ChangeLog").

Most if not all of these stuff can be automated in one step.

The steps involved are:
- Compare and update the database, don't remove anything
- Install the new static tables
- Clear cache-tables
- Optionally clear typo3temp/ (e.g. if the upgrade requires it: 3.8.0 > 3.8.1)
Remove "temp_CACHED_" files

If that is what the user is expected to do anyway when he upgrades, why not provide this functionality directly in the upgrade wizard as one single step?

Why should we make life more difficult than needed for users wanting to upgrade?

I still think its ugly to let any user login into the backend of a "corrupted" installation, as this might be the first thing an admin tries to do. We can detect that (simply store the latest installed version somewhere in localconf.php, as we already do with the compatVersion) and then redirect automatically to the Upgrade Wizard.
(issue imported from #M2175)