Bugged fountains renamed

• The legacy fountains inside smaller containers have been changed a bit. Their function is exactly the same as before in most respects but are named “unstable source rift”. These rifts will disappear in a bit more than a year from now. When they disappear any items inside will either end up in the container they are in at that time or outside on the ground if they don’t fit.
• Rifts are made from magic and not from stone, so they can not be improved.
• We will add features that compensate for the loss of most or all of the functionality that these provide up until then.