Feature: #67875 - Override CategoryRegistry entries 

See forge#67875

Description 

The makeCategorizable method of the \TYPO3\CMS\Core\Utility\ExtensionManagementUtility class has been extended with a new parameter override to set a new category configuration for an already registered table / field combination.

If the parameter is set to TRUE, previously defined registry entries are cleared for the current table / field combination before adding the new configuration.

The intended usecase for this method is to add additional TCA types for a previously registered table.

A good example is the tt_content table:

  1. The basic TCA is defined in the frontend Extension.
  2. After the processing of the normal TCA definition, the default categorized tables (from the install tool setting SYS/defaultCategorizedTables) are initialized and the categories tab is added to the showitem configuration for all TCA types that exist so far.
  3. Now the TCA overrides are processed. The css_styled_content Extension defines additional TCA types. After the types are defined the addOrOverride() method is called to add the category tab to them.

Impact 

The current behavior of the existing functionality is not changed. Only new functionality is added.

Example 

// This example is from the tt_content TCA overrides file from the css_styled_content Extension.
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::makeCategorizable('css_styled_content', 'tt_content', 'categories', array(), TRUE);
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