Should ImageButton be included in the builds?

[Reinmar]

Extracted from #567.

me:

Should the "Insert image" button be available in those builds too? I know that it should not appear automatically in the toolbar, but should the plugin be enabled?

@wwalc:

Shouldn't we track it in a separate ticket as it's a completely separate issue?
The original issue was about two particular plugins which were already included, hence this issue could be closed.

The new issue could be about the Image Button and our strategy towards it. For example I have some concerns regarding mobiles. On mobiles the only reasonable way to insert an image is a toolbar button. If it's not available in Builds by default then there is a "?" regarding basic support for mobiles by CKEditor 5 Builds

[fredck]

So we must also check how this button behaves on mobiles, first of all. I'm curious to see it.

[fredck]

As a first feeling, I would be for including the plugin in the build but not in the toolbar configuration, leaving the implementor one config away from having it.

[Reinmar]

The button was added to all builds.