[UPD] Bugfix: Spell Selection, Upgrades

There were a number of bugs in the last update. Though there are only two spells available at the moment, the player was not able to select a second spell as an upgrade. Fixing this required some new database entries and a complete rework of the player's upgrade pipeline.

Once that was fixed, I noticed players would then not receive an opportunity to choose which spell to upgrade; they would get one choice, randomly selected for them. This has also been fixed.