* Dashboard: Remove template variables option and update style of ShareModal (#29191)
* Simplified design
* Changed to text area component for embed and replaced select with RadioButtonGroup
* Use primitive string instead of SelectableValue in the states
* Changed embed html TextArea to writable and added a copy to clipboard button
* Added some space between the buttons on the snapshot tab and removed unnessecary FieldSet elements
* Add descriptions to the tabs that were missing descriptions
* Capitalization of theme names
Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
