|This function is protected, and may only be called in response to a hardware event.
Reloads the User Interface.
- Reloading the interface saves the current settings to disk, and updates any addon files previously loaded by the game. In order to load new files (or addons), the game must be restarted.
- You can also use the /reload slash command; or the console equivalent: /console ReloadUI
- Patch 7.2.5 (2017-06-13): Moved to C_UI.Reload. The previous alias is still available as a script wrapper. 
- Patch 1.1.0 (2004-11-07): Added as ReloadUI.