Migrate contact form settings to grid view

[BurntimeX]

• Split ContactSettingsPage into two different pages (ContactOptionListPage + ContactRecipientListPage)
• Give the contact form its own section in the ACP menu (use the new API for adding the menu items)
• Migrate both lists to grid view
• Use the new ChangeSortOrder component for the Drag-and-Drop feature.

requires #6277