Undo button fix in theming

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

apps/theming/css/settings-admin.scss

@@ -26,6 +26,8 @@
         vertical-align: top;
         display: inline-block;
         visibility: hidden;
+        height: 32px;
+	    width: 32px;
     }
     form.uploadButton {
         width: 411px;