Workspace: fixed colorEvenSingle option

- did not work at all before

vispa/static/js/views/main.js

@@ -66,7 +66,7 @@ define([
         return n;
       },
       color: function() {
-        if (this.numberWsConnected<=1) return "";
+        if (this.numberWsConnected<=1 && !vispa.wsManager.prefs.get("colorEvenSingle")) return "";
         return this.instance.workspace ?
           this.instance.workspace.color :
           vispa.wsManager.prefs.get("color");