Cleanup TYPO3 Maintenance / Install Tool
As the install tool is no longer called "Install Tool" but "Admin Tool" we should start a full cleanup:
- ENABLE_INSTALL_TOOL file
- wording "Install Tool" vs. "Admin Tool" vs. rename to "System Management" or alike
- cards should have "action" headlines (Change..., Configure...)
- "Install Tool Password"
When writing documentation, this gets really obvious as its pretty confusing for new users, to have three different names for the same thing.