Disable extension auto-upgrade when an extension is downgraded or installed on a non-latest version

[aubincleme]

When an admin installs a specific version of an extension, it's usually to answer a specific need or fix a specific issue. If the licensor starts auto-upgrading the extension, it may add more confusion.

[mflorea]

when an extension is downgraded

There's no difference from the Extension Manager point of view between an extension that was installed at version 2.3 and an extension that was downgraded to version 2.3 from 3.1. The downgrade is just an UI action that triggers an install job where the specified version happens to be lower than the installed version.

or installed on a non-latest version

This becomes true as soon we we release a new version.

When an admin installs a specific version of an extension

You always install a specific version.

I don't see the need for this issue as long as we have #109 and #111.

[aubincleme]

Yes no need for the issue if #111 is done ; thanks