Add units, unit controls to inspector

app/models/models.js

Index: app/models/models.js
=== modified file 'app/models/models.js'
--- app/models/models.js	2013-06-27 15:26:46 +0000
+++ app/models/models.js	2013-07-05 16:23:50 +0000
@@ -300,11 +300,26 @@
 
     process_delta: function(action, data, db) {
       var instance = _process_delta(this, action, data, {relation_errors: {}});
-      if (!instance || !db) {return;}
+      if (!db) {
+        return;
+      }
       // Apply this action for this instance to all service models as well.
       // In the future we can transition from using db.units to always
-      // looking at db.services[serviceId].units
-      var service = db.services.getById(instance.service);
+      // looking at db.services[serviceId].units.  Note that, in the case of
+      // `action === 'remove'`, instance will be null, so we retrieve the
+      // service name from `data`, which is the removed unit's name.
+      var service;
+      if (!instance) {
+        if (typeof data === 'string') {
+          service = db.services.getById(data.split('/')[0]);
+        } else if (data.service) {
+          service = db.services.getById(data.service);
+        } else {
+          return;
+        }
+      } else {
+        service = db.services.getById(instance.service);
+      }
       if (!service) { return; }
       // Get the unit list for this service. (lazy)
       var unitList = service.get('units');