Move owned placeables

Move owned placeables directly in construction mode instead of selling and replacing them.

Features:
- Move button in the placeable info dialog
- Left-drag movement with height and rotation controls
- Controls shown in the built-in top-left controls menu
- Ground refresh at the new location after confirming
- Best-effort restore of the old ground to reduce leftover muddy patches

Controls:
- Left mouse drag: move
- Page Up / Page Down: height
- R / F: rotate
- Delete: reset
- M: confirm
- Esc / Back: cancel

Limitations:
- Animal pens are blocked for now because their fence networks do not move safely with the pen

Please keep a backup of your savegame before moving complex productions, fences, or other advanced placeables.
If you find an issue or have a suggestion, please post it in the comments.