1.620 Update - music and holiday cheer

Happy Holidays Everyone!

- added piano, drumkit, xylophone, pookie bear, stockings and giant candy cane

- hide floors and hide stages can be used together now instead of one toggling the other off

- fixed resource count error with a few armor building block types not rounding up cost

- fixed a few bad bugs with electricity in multiplayer

- improved 3rd person jetpack "physics"

- added 3rd person head look at mouse position

- wires hide correctly now when using the "use height" option with hide floors

- even lower part rotation when holding alt while using mouse wheel

- fixed on-wall electric devices being offset slightly into wall on placement

Patched in already:

- button added to infospot panel to move/rotate spot after placing

- fixed bug with loading save while infospot panel is open

Edit: Just added a discount for the Winter Sale

https://store.steampowered.com/app/1100550/FORTIFY_ELECTRIC_UPGRADE/