Fix issue with permanently hidden Campaign Features in Comp Browser

[DocSchlock]

Closes #15555

Issue was the campaignFeature sources were getting permanently set to load = false.

I noticed there was no pack settings to toggle it, so I added it and it fixed the issue.

[CarlosFdez]

I remember hiding campaign features when kingmaker is disabled. Can you also hide the setting along with it?

[DocSchlock]

I remember hiding campaign features when kingmaker is disabled. Can you also hide the setting along with it?

So I took a look: the template's context for settings is narrowed using a with block that excludes showCampaign, the visibility flag.

I would need to unravel the context narrowing - if that's okay, I can do it, but otherwise I'm not sure how to get the flag to the partial's context to correctly hide the pack setting.

EDIT: I guess the other option would be cloning the flag into the settings structure so it can be referenced even with the narrowing.

[DocSchlock]

Decided to go the clone route.

[CarlosFdez]

You can always use @root. to get the root one, as well as ../ to go one step up, if that works better with less changes. Otherwise I'd only keep showCampaign at the root level and remove it from the tab settings (accessed via @root.showCampaign) if need be.