Add Option to Disable GUI Vertical Movement in Freecam

[IsaacDawg97]

Describe the feature

Add a checkbox in GUI Move to toggle Shift (and maybe Space) moving the player vertically while in Freecam.

Little annoying being moved down in Freecam when using Shift to move items from Inventory to Hotbar.
I know that I can press Shift and Space to cancel them out, but still would be a nice QoL feature.

Before submitting a suggestion

• This feature doesn't already exist in the client. (I have checked every module and their settings on the latest dev build)

• This wasn't already suggested. (I have searched suggestions on GitHub and read the FAQ)