Issue #3218227: ConfigDeleteInterface::delete should allow ConfigEntity preDelete hooks to be invoked

Issue #3054659 by joachim, jhodgdon, bloke_zero, Pasqualle: Invalid parameter for report URL if module config file is malformed

Issue #3089407 by jhodgdon: Automated test results are showing "Build successful" (actually means it failed)

Issue #2959072 by jhodgdon, mtodor: Normalization should not strip uuid on deeper configuration levels

Add confirm form for importing, and throw 404 errors instead of 500 exceptions when import, delete, or revert URLs are invalid