Make sure all toolbar icons and buttons are vertically centered.

services/web/public/stylesheets/app/editor/toolbar.less

@@ -77,10 +77,12 @@
 		display: flex;
 		float: left;
 		text-align: center;
+		align-items: center;
 	}
 
 	.toolbar-right {
 		display: flex;
+		align-items: center;
 		flex-grow: 1;
 		justify-content: flex-end;
 		.btn-full-height {