gui: Slightly lighten Text for Disconnected/Scanning in Dark Theme

gui/dark/assets/css/theme.css

@@ -247,3 +247,12 @@ code.ng-binding{
 .progress .frontal {
     color: #222;
 }
+
+.text-info {
+    color: #9a6dc0;
+}
+
+.text-primary {
+    color: #3fa9f0;
+}
+