Add textarea for template descriptions in templates

[Juergen]

It would be nice if a description field will also be added to the templates. At the moment only a label field is included. In my case I use a custom dashboard on the frontend with links to the different content types.

On the frontend the description field could be used as a title attribute for the links. So the editor could see if it is the right content type he is looking for by hovering over the links. On the backend side the description could be displayed under the title of the template.

This could be a useful addition to give users a little more information about the template itself.

Example for a description: Template for creating an event with start and endpoint and the possibility to enter prices, locations, number of participants and more.