clamp content preview to single line in three panel mode

css/tt-rss.css

@@ -584,6 +584,13 @@ div.autocomplete ul li {
 	cursor : pointer;
 }
 
+.hlTitle {
+	overflow : hidden;
+	white-space : nowrap;
+	max-width : 500px;
+	text-overflow : ellipsis;
+}
+
 .hlContentH a, .hlContentH span {
 	color : #00cc00;
 }