Paket doesn't ignore sub folders with paket.dependencies #3444

Description

According to this issue #918, paket should not process directories if it detect a paket.dependencies in the ancestor. But this is not the case from what I am experiencing.

Repro steps

1. git clone git@github.com:MangelMaxime/Fulma.git
2. cd Fulma
3. mono .paket/paket.exe update

Paket failed with
-> Package Fulma was referenced in /Users/maximemangel/Workspaces/Tests/FulmaReproBugPaket/templates/Content/src/FulmaMinimalTemplate.fsproj, but it was not found in the paket.lock file in group Main.

Expected behavior

Paket should ignore files under templates/Content

Actual behavior

Paket is failing.

Known workarounds

Rename paket.references under templates/Content to paket.references2 and then revert the renaming.