Export stored selection as nonessential data

[erikari]

Reference thread:

the content stored using ctrl+numeric keys disappears when exporting json from a higher version (4.2) to a lower version (4.1), even if "non-essential data" is checked when exporting json.

If the storage interface can be implemented in the future, I hope that the contents of the storage group can also be saved in a json file to facilitate operations such as converting high version to low version. Of course, the contents of the storage group can be divided into "non-essential data" and the user can choose whether to export it.

4.2 Json export does not export stored selection in 4.2 jso format either.