Inherit text color for filter list elements

Filter list (left side panel) in WebUI is implemented using <a> tags,
CSS defines default style for all <a> elements, and specific style for
filter list elements. Default style for <a> elements sets color, and
this color also used in list. This is looks not so well. So lets just
inherit text color from parent element, and as so as it is not set, so
default text color will be used.
This makes filter list looks like other UI elemets, making all UI more
consistent (like in desktop app).

src/webui/www/private/css/style.css

@@ -457,6 +457,7 @@ ul.filterList a {
     overflow: hidden;
     white-space: nowrap;
     text-overflow: ellipsis;
+    color: inherit;
 }
 
 ul.filterList li:hover {