Trigger input change event in password_fill.

misc/userscripts/password_fill

@@ -358,11 +358,13 @@ cat <<EOF
             if (isVisible(input) && (input.type == "text" || input.type == "email")) {
                 input.focus();
                 input.value = "$(javascript_escape "${username}")";
+                input.dispatchEvent(new Event('change'));
                 input.blur();
             }
             if (input.type == "password") {
                 input.focus();
                 input.value = "$(javascript_escape "${password}")";
+                input.dispatchEvent(new Event('change'));
                 input.blur();
             }
         }