Fixes non-multiple compound metadata not surrounded by 'tainacan-compound-group'

src/views/admin/components/metadata-types/compound/class-tainacan-compound.php

@@ -189,6 +189,7 @@ class Compound extends Metadata_Type {
 			}
 			
 		} else {
+			$return .= '<div class="tainacan-compound-group">';
 									
 				foreach ( $value as $meta ) {
 
@@ -205,7 +206,7 @@ class Compound extends Metadata_Type {
 					}	
 					
 				}
-			
+			$return .= '</div>' . "\n\n";
 		}
 		
 		return $return;