Create preview for content group template selection
Add new preview button next to add button in content group template selection. In preview show full description, all tags, link to license and list of content templates.
For this add new ContentGroupTemplatePreviewComponent
.
Also create TemplateLicenseComponent
for displaying the license with and without link and use it in ContentGroupTemplateComponent
as well. For this extend LICENSES map.
Use loading button and form component for add actions in template selection (list and preview).
Closes #1198 (closed)