Niklas Natter

#### What's in this PR? This PR demonstrates how to add a custom toolbar action to a form view of the administration interface of Sulu. The example adds a simple...

#### What's in this PR? This PR demonstrates how to add a custom toolbar action to a list view of the administration interface of Sulu. The example adds a simple...

#### What's in this PR? This PR demonstrates how to implement a custom field transformer, which can be used to format data inside of lists. The example registers a simple...

#### What's in this PR? This PR demonstrates how to implement a custom content type, which can be used inside of page templates and custom entity forms. The example registers...

#### What's in this PR? This PR demonstrates how to render a custom view inside of the administration interface of Sulu. The example registers a simple `app.contact_statistics` view that fetches...

[Example] Modify list and form of built-in category entity

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#### What's in this PR? This PR demonstrates how to modify the list view and the form view of the the built-in category entity. The example hides the `key` property...

[Example] Add trash functionality to custom entity

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#### What's in this PR? This PR demonstrates how to integrate a custom entity with the [SuluTrashBundle](https://docs.sulu.io/en/2.4/bundles/trash.html). 

#### What's in this PR? This PR demonstrates how to overwrite/extend the default styling of the administration interface of Sulu. > Please be aware that the styling of the administration...

#### What's in this PR? This PR demonstrates how to add an additional property to the Excerpt & Taxonomies tab of the page detail view.

Allow to display custom error message for specific field in Form

2

# Problem description The Form view displays two kinds of errors; **field-specific validation errors based on the form configuration** and **custom error messages returned by the server**. Unfortunately, it is...