Use css to provide ellipsis for buddy subline.

src/styles/components/_buddylist.scss

@@ -237,7 +237,8 @@
     left: 65px;
     overflow: hidden;
     position: absolute;
-    right: 0;
+    right: 4px;
+    text-overflow: ellipsis;
     top: 33px;
     white-space: nowrap;
   }

static/js/services/buddylist.js

@@ -446,11 +446,9 @@ define(['jquery', 'angular', 'underscore', 'modernizr', 'avltree', 'text!partial
 				display.subline = "";
 				return;
 			}
-			if (s.length > 20) {
-				display.sublineFull = s;
-				s = s.substr(0, 20) + "...";
-			} else {
-				display.sublineFull = null;
+			display.sublineFull = s;
+			if (s.length > 100) {
+				s = s.substr(0, 100);
 			}
 			display.subline = s;