Fixing more stuff

- FOV Slider has been added to the settings - The Twin Skull boss should no longer have the shield up for forever after killing the other skull - Also, did you notice how large is that guy's sword?! But then again size may be deceiving.... (this is a hint for killing the Lingering Though a bit faster, you just have to look where you might not wanna usually look, or maybe you do? idk, I don't know you... I would look :P )