Enhancement: Alert if try to save manifests with unpopulated package references

[diwanicki]

When performing maintenance, etc, sometimes a manifest will contain a reference to a package which was removed via another process (or was not activated properly in the related catalog, etc).

There should be a sanity check run by the program when a save or make is initiated by the user, to help locate these items. Often, the only indication of this condition is when munki starts to throw multiple warnings:

• Could not process item GitHub for optional install. No pkginfo found in catalogs: production

Catalog

Manifest

[diwanicki]

At the very least, the "No matching packages in selected catalogs" should be colored red.

[hjuutilainen]

Completely agree. Definitely added to the manifests UI todo list.