id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12629	Summarize changes in relation editor	verdy_p	team	"Cloned from #12617:

Note also that the pane showing the history of changes does not even indicate how many members were added or removed when applying changes and closing the relation editor.

We ONLY see that the relation was changed, without more details: we should have a ""+"" icon showing details, containing at least:

* the list of members added, and the list of members removed, and we should be able to select elements from these list, to help restoring elements that were unexpectedly removed from the list of members, without necessarily having to completely revert ALL edits made in the relation editor;
* it should also probably say if tags were modified, just like with other elements (nodes/ways) or when editing tags from the tags pane (outside the relation editor itself).
"	enhancement	new	normal		Core			relation changes	simon04