[BUG] Fleet events delete carried resources

[Geda173]

Describe the bug
When sending resources with a fleet to achieve a task, upon event generation the carried resources are deleted. Example: Sending an expedition with resources to the expedition slot or sending a recycler with resources to mine a debris field will override the carried resources once the result of that event is generated.

To Reproduce
Steps to reproduce the behavior:

1. Go to Fleet.
2. Select Recycler or other ships.
3. Enter coordinates for the expedition slot (x:x:16) or for a debris field. Dispatch fleet.
4. Once the event happens, the cargo will be overwritten, resulting in lost resources.

Expected behavior
The resources should stay with the fleet and be delivered upon return. Unless a black hole swallows them during the expedition. Saving to debris fields is a standard saving tactic in OGame.

[lanedirt]

@Geda173 Good point, thanks for creating the issue. There should be a todo somewhere in the code for this as well as I recently discovered the same.