#1700 Manage exisiting archive settings

[GGBce]

I suggest a new feature in 7-Zip that could help to be more productive when it's time to manage pre-existing archive files, like that:

In GUI interface, if I open a 7z, zip, etc file where some settings was defined when the original archive was created, I can't modify these settings like compression or password. It's necessary to uncompress the archive and create a brand new one.

It happen somewhat the need to remove a password or try to recompressed with higher ratio.

I understand that "all" options couldn't/shouldn't be available during a "modify" step like a new archive, like change from 7z through zip format. But at least offer every settings based on the same format of the current archive.