[2.0.20] Blueprint is automatically saved after selecting new contents

[lzw]

1. Put object 1 on the ground.
2. Put object 2 on the ground.
3. Make a BP with object 1 and save it.
4. Open edit that BP.
5. Press Select new contents.
6. Select object 2 as new contents.
7. Press X button in BP window or Escape (close without saving).

If you open the BP now, you will see object 2 in it. But we did not save our changes.

[Muche]

Duplicate of 87343 "Select new contents for the blueprint" saves blueprint directly after new selection.
Works as designed, even if unintuitive.