First visit http://fontawesome.io/cheatsheet/, then it's your turn. Please don't leave this for me to fix, because you'll hate it. There are a few icons we'll have to map to something appropriate - such as "matrix"; though there are some interesting options - and you can always dip into unicode if you don't find something appropriate here; though I would suggest that *if* you do this to create an icon-xyz class wrapper to the HTML "i" tag so that it's handled exactly the same.

view/theme/redbasic/css/style.css

@@ -909,6 +909,12 @@ footer {
 .wall-item-wrapper {
     margin-left:10px;
 }
+
+.wall-item-wrapper .icon-ok {
+	cursor: pointer;
+	color: darkgreen;
+}
+
 .wall-item-lock {
     left: 105px;
     position: absolute;