fix spinner layout bouncing when changing notifs

all-important s/done/then/ on pushRulesPromise to ensure that the refresh completes before relaying-out the page
s/Loud/Highlight & sound/

src/skins/vector/css/matrix-react-sdk/structures/UserSettings.css

@@ -106,6 +106,10 @@ limitations under the License.
     display: table;
 }
 
+.mx_UserSettings_notifTable .mx_Spinner {
+    position: absolute;
+}
+
 .mx_UserSettings_profileTable
 {
     display: table;