New: Tooltips for remove actions

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

frontend/src/AddArtist/ImportArtist/SelectFolder/ImportArtistRootFolderRow.js

@@ -40,6 +40,7 @@ function ImportArtistRootFolderRow(props) {
 
       <TableRowCell className={styles.actions}>
         <IconButton
+          title="Remove root folder"
           name={icons.REMOVE}
           onPress={onDeletePress}
         />