Added a SoundManager Class and a Volume Slider to the options menu that can be used to change the volume of all sounds.

Fixed a Bug where Facts stay assigned in scroll even when deleted in the world. Now they also are deleted in the scoll.
There are still issues with the dynamic scroll assignment however.

Removed some unused functions implemented for the invalid assigned fact animations.

Added some comments to popupbehavior script

Removed TMP-git-ignore AND prevented from Creating the Same Distance-/Angle-Fact twice except Pushout-Facts