Update pageview tracking

Based on more feedback from segment.io support.
Still trying to get Google Analytics virtual pageviews to work
correctly.

app/core/Tracker.coffee

@@ -19,21 +19,37 @@ module.exports = class Tracker
       traits[userTrait] ?= me.get(userTrait)
     analytics.identify me.id, traits
 
-  trackPageView: (name=null, includeIntegrations=null) ->
+  trackPageView: (virtualName=null, includeIntegrations=null) ->
+    # console.log 'trackPageView', virtualName, includeIntegrations
     # Google Analytics does not support event-based funnels, so we have to use virtual pageviews instead
     # https://support.google.com/analytics/answer/1032720?hl=en
-    # https://segment.com/docs/libraries/analytics.js/#page
-    unless name?
-      name = Backbone.history.getFragment()
-    console.log "Would track analytics pageview: /#{name}" if debugAnalytics
-    return unless @isProduction and analytics? and not me.isAdmin()
-    if includeIntegrations
+    name = virtualName ? Backbone.history.getFragment()
+
+    properties = {}
+    if virtualName?
+      # Override title and path properties for virtual page view
+      # https://segment.com/docs/libraries/analytics.js/#page
+      properties = 
+        title: name
+        path: "/#{name}"
+
+    options = {}
+    if includeIntegrations?
       options = integrations: {'All': false}
       for integration in includeIntegrations
         options.integrations[integration] = true
-      analytics.page "/#{name}", {}, options
-    else
+
+    console.log "Would track analytics pageview: '/#{name}'", properties, options if debugAnalytics
+    return unless @isProduction and analytics? and not me.isAdmin()
+
+    # Ok to pass empty properties, but maybe not options
+    # TODO: What happens when we pass empty options?
+    if _.isEmpty options
+      # console.log "trackPageView without options '/#{name}'", properties, options 
       analytics.page "/#{name}"
+    else
+      # console.log "trackPageView with options '/#{name}'", properties, options 
+      analytics.page "/#{name}", properties, options
 
   trackEvent: (action, properties, includeIntegrations=null) =>
     # 'action' is a string