Optimized dark theme mode

- Make dark theme mode less dark

src/web/snippet/upstreams.html

@@ -36,6 +36,10 @@
                 overflow-y: auto;
             }
 
+            body.darkTheme #upstreamTable{
+	            border: 1px solid var(--button_border_color);
+            }
+
             .upstreamEntry.inactive{
                 background-color: #f3f3f3 !important;
             }