Add element name validation to createElement endpoint.
Add client side element and plugin name validation functions with configurable regex.
Add validation to plugin id in create plugin endpoint.
Fixed client side validation expressions.
Added popup callback to create plugin endpoint errors.
Change regex to validate image name.
Add function to get sparkl settings.
Add image test and placeholder alternative to cards component. Add random color placeholder with plugin name or plugin id.
Remove unnecessary files com cards component.
Add tab container to sparkl header. Set all content tabs to be hidden at the start.
Change "Import" label to "Unpack".