Detach session activity update from statuses (#6379)

model/session.go

@@ -10,12 +10,13 @@ import (
 )
 
 const (
-	SESSION_COOKIE_TOKEN  = "MMAUTHTOKEN"
-	SESSION_COOKIE_USER   = "MMUSERID"
-	SESSION_CACHE_SIZE    = 35000
-	SESSION_PROP_PLATFORM = "platform"
-	SESSION_PROP_OS       = "os"
-	SESSION_PROP_BROWSER  = "browser"
+	SESSION_COOKIE_TOKEN     = "MMAUTHTOKEN"
+	SESSION_COOKIE_USER      = "MMUSERID"
+	SESSION_CACHE_SIZE       = 35000
+	SESSION_PROP_PLATFORM    = "platform"
+	SESSION_PROP_OS          = "os"
+	SESSION_PROP_BROWSER     = "browser"
+	SESSION_ACTIVITY_TIMEOUT = 1000 * 60 * 5 // 5 minutes
 )
 
 type Session struct {