Added a debug toolbar panel for MongoDB
merge with upstream
Dynamic naming added to `DbPanel`
`MongoDbPanel` addition mentioned at CHANGELOG.md and README.md
`DbPanel` summary view fixed
Use a slightly more recent version
for check
new translation
Merge pull request #28 from funson86/master

Translated structure-filters.md and structure-widgets.md. [skip ci]
Typo in the english version
Update ArrayDataProvider.php

ensure syntax highlighting
Remove stability=dev

Shouldn't stability=dev be removed?
Merge pull request #5534 from germanliu/patch-1

[skip ci] Remove stability=dev
Update tutorial-mailing.md
Merge pull request #5535 from germanliu/patch-2

[ci skip] Update tutorial-mailing.md
phpdoc fixes and additions
Used import instead of FQN
more phpdoc
Removed unused aliases
Removed unused code