Fix copy-paste and cut-paste in GridMap

[Nodragem]

fix #52608 which also makes "paste selects" option useful again.

The idea of the fix is to block the propagation of the click once the Gridmap has consumed it.

[Nodragem]

is it too late to get into 4.3? knowing it is a small, uncontroversial fix with big usability improvement?

[AThousandShips]

We are only merging critical regressions right now, it'll hopefully make it into 4.3.1

[Nodragem]

that would be great, thanks!

[Calinou]

Tested locally, it works as expected.

Note that I still find the copy/paste UX in the GridMap editor to be suboptimal (I'd expect to be able to press Ctrl + V to confirm copying or cutting and be able to do it multiple times), but this will do for now.

[akien-mga]

Thanks!

[Nodragem]

Thank you for merging my contribution!

Tested locally, it works as expected.

Note that I still find the copy/paste UX in the GridMap editor to be suboptimal (I'd expect to be able to press Ctrl + V to confirm copying or cutting and be able to do it multiple times), but this will do for now.

I am using it and I think it works pretty well, but I agree that these are not really copy/paste and cut/paste functions.

The current behaviours could probably be better named as "Duplicate Selection" (already the case*) and "Move Selection"; and their shorcuts could be a one key shorcut. Furthermore, I would probably change the option "Paste Selects" to something clearer like "Keep Original selected", and group the "Move Selection", "Duplicate Selection", "Keep Original Selected" together is the menu.

But, what I would really like to work on next, is to surface all this tools in a bottom panel and show them as icons, see this proposal:
godotengine/godot-proposals#10405

[akien-mga]

Cherry-picked for 4.3.1.