[less] Move `margin` and `padding` on `body` only

Both properties are needed for normalizing different browsers (`padding`
infamous on older Operas) and are only needed on `body`.

Change-Id: I661869ed43491824cbfe86dc36e39f97e29ccf8a

resources/skins.vector.styles/common/normalize.less

@@ -9,6 +9,9 @@
 html,
 body {
 	height: 100%;
+}
+
+body {
 	margin: 0;
 	padding: 0;
 }