1. Created the relevant stuff on properties.xml
<properties>
<property id="Separator" type="boolean">true</property>
</properties>
.
.
.
<string id="Separator">Show Time Separator?</string>
.
.
.
<setting propertyKey="@Properties.Separator" title="@Strings.Separator">
<settingConfig type="boolean" />
</setting>
But what should I set within the xxxView.mc file itself? I have tried
if ((App.getApp().getProperty("Separator")) == true) {Colon = ":";}
var sep = Colon;
Which works when it is true, but gives me two big blank space when it is false. See picture: