TYPO3 Core

In a new installation (tested with 7.2 master, iirc in 7.1, too), the RTE is disabled for a user by default. It should be enabled again.

How to reproduce: Install TYPO3 7 and make sure that the download of distributions is activated.
Cause: The start module of the user is set to the distributions download in the EM. In that case, the "uc" isn't empty anymore, so the default config doesn't get written.

It's not that easy to solve, as the "uc_default" array is hardcoded in the BackendUserAuthentication. IMO, the best solution is to always write that config into TYPO3_CONF_VARS/BE/defaultUC, which is accessible in the Install Tool then. In the same step, we can deprecate $uc_default in BackendUserAuthentication then.