Add device group filter to widgets (#9692)

app/Models/Device.php

@@ -429,6 +429,15 @@ class Device extends BaseModel
         return $this->hasDeviceAccess($query, $user);
     }
 
+    public function scopeInDeviceGroup($query, $deviceGroup)
+    {
+        return $query->whereIn('device_id', function ($query) use ($deviceGroup) {
+            $query->select('device_id')
+                ->from('device_group_device')
+                ->where('device_group_id', $deviceGroup);
+        });
+    }
+
     // ---- Define Relationships ----
 
     public function alerts()