Add a VISIT function to the clan search box.

This button would appear in the clan search box and if you already have a clan it would allow you to request to visit another clan rather than having to leave your current clan to pop in and visit a friend in another clan. The clan would see a request to visit similar to the request to join. If accepted you could could donate or receive troops, but that would be the limit to which a visitor could participate. This would remove the hassle of having to leave and rejoin a clan for the same reason. It would also be wise to add an option for the clan leader/co-leaders to be able to toggle the function to receive visit requests on/off.