Move Tool

NOTE: It is recommended to create a backup of your world!
Some internal SaveGame data of the mod has changed. During testing, migration worked flawlessly, but better be safe than sorry.

- added new "Group Tool" to group different structures together to act as if they were one
- added "GroupMaxStructures" config option to limit how many structures can be in one group (defaults to 100)
- add button to move tool UI to ignore the grouping from the group tool for the current structure
- add button to move tool UI to switch between the full options and a simplified subset
- only allow structures to be moved or grouped if the player has permission to do so (owner or in tribe of owner)
- improve gizmo handling and display
- support correctly moving structures that are attached to a different (moving) structure (like a platform/raft)