Give error-toast a duration argument

res/js/common.js

Index: res/js/common.js
diff --git a/res/js/common.js b/res/js/common.js
index fce0ff2bec2d7246f265eafe9648585b4075647b..73aa8d4740bb665c04e1a0569f1de7bc16a694e7 100644
--- a/res/js/common.js
+++ b/res/js/common.js
@@ -71,10 +71,11 @@ this.sk = this.sk || function() {
    * and displays the error messages.
    *
    */
-  sk.errorMessage = function(message) {
+  sk.errorMessage = function(message, duration) {
     var detail = {
       message: message,
     }
+    detail.duration = duration;
     document.dispatchEvent(new CustomEvent('error-sk', {detail: detail, bubbles: true}));
   }