Use smaller top margin for selectors

Author: JorikSchellekens

res/css/views/settings/tabs/user/_AppearanceUserSettingsTab.scss

@@ -59,7 +59,7 @@ limitations under the License.
         flex-direction: row;
         flex-wrap: wrap;
 
-        margin-top: 13px;
+        margin-top: 4px;
         margin-bottom: 30px;
 
         > .mx_RadioButton {