Make Echo icons more likely to remain inline

Sometimes they wind up stacked vertically. They should be
horizontal. I don't know.

Change-Id: I92eaaa6c2e52944d818f042ea1bfed4a43ed0943

resources/extensions/Echo.less

@@ -21,6 +21,7 @@
 		}
 		li {
 			margin: 0 0.75em 0 0;
+			float: left;
 		}
 	}