keep counterNode always visible when feedTree rows get longer

.dijitTreeRow gets a width set by dojo.js. Max-width keeps it from growing too big. overflow: hidden and text-overflow: ellipsis shorten the text with an ellipsis so the counterNode won't cover the text.

tt-rss.css

@@ -1067,3 +1067,8 @@ div.hl.active {
 	min-width : 23px;
 }
 
+#feedTree .dijitTreeRow {
+	max-width: 100%;
+	overflow: hidden;
+	text-overflow: ellipsis;
+}