message: Initialize all class member variables (lib)
diff: @@ -349,6 +349,7 @@ class TOGGL_INTERNAL_EXPORT GUI : public SyncStateMonitor {
  GUI()
  : on_display_app_(nullptr)
  , on_display_error_(nullptr)
  + , on_display_overlay_(nullptr)
  , on_display_online_state_(nullptr)
  , on_display_login_(nullptr)
  , on_display_url_(nullptr)
  @@ -375,6 +376,7 @@ class TOGGL_INTERNAL_EXPORT GUI : public SyncStateMonitor {
  , on_display_promotion_(nullptr)
  , on_display_help_articles_(nullptr)
  , on_display_project_colors_(nullptr)
  + , on_display_countries_(nullptr)
  , on_display_obm_experiment_(nullptr)
  , lastSyncState(-1)
  , lastUnsyncedItemsCount(-1)
  