re-run playground tests

Author: christopherjeon

apps/dash-brain-viewer/assets/default.css

@@ -17,7 +17,7 @@
 */
 
 /* PLotly.js 
-–––––––––––––––––––––––––––––––––––––––––––––––––– */
+––––––––––––––––––––––––––––––––––––––––––––––– */
 /* plotly.js's modebar's z-index is 1001 by default
  * https://github.com/plotly/plotly.js/blob/7e4d8ab164258f6bd48be56589dacd9bdd7fded2/src/css/_modebar.scss#L5
  * In case a dropdown is above the graph, the dropdown's options