Remove 'id' => 'master_id'

To make this possible controller has to override _getRowById, providing additional component_id and
querying for master_id not for id. Now also RowData is not needed anymore.
Update _getRowById($id) to newer way to get a single row by id

This was updated because in kwc-basic-table-trl _getRowById($id) was changed to get the selected
master-data based on component-id.
Add comment to refer to class using this function
Move set of default tag from template into static css-generating function
Remove test because it's included in the other tests