id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13036	More validation for commands	michael2402	team	"Currently, the command class does only few validation of the layer the command works for.

I suggest:
- ~~Enforce that `layer` may not be null. Make command construction fail if it is.~~
- Always set the layer/dataset the command is working on.
- Check that all primitives of that command belong to the layer `layer` (for add/move/delete/... commands).
  - if plugins want to change this, we can provide them with the means to extend the commands. They have to take care of the problems that occur then, e.g. handle data integrity.
"	enhancement	new	normal		Core			gsoc-core command	Don-vip bastiK stoecker