Fixes #5600: Allow configuring debug panels in `yii\debug\Module::panels` as panel class name strings

Fixes #5584: `yii\rbac\DbRbacManager` should not delete items when deleting a rule on a database not supporting cascade update

[skip ci] added more markdown tags to versions.md for better readability

[skip ci] Fixed typos

Fixed typo

[ci skip] Docs ja 2014 10 15b

[ci skip] Update structure-controllers.md

[skip ci] Update structure-controllers.md

Revert "implementing mongodb panel bootstrap behavior #3855"

Added Swedish translations for Yii messages

[skip ci] Update README.md

"con arreglo a" no tiene sentido en español.
"bajo" es lo correcto.

implementing mongodb panel bootstrap behavior #3855

Merge branch 'mongodb-debug-short' of github.com:klimov-paul/yii2 into klimov-paul-mongodb-debug-short

Small fix [skip ci]

little typo