Prevent softinteract icons from being replaced

[tflo]

KNP replaces certain softinteract icons with ugly zero-health nameplates.

This is true for the interact icons of fishing bobbers, mining/herb nodes, mailboxes, etc.

Example:

In Name-only mode it gets reduced to the zero level number:

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The proposed change seems to fix this:

(Nameplates of softinteractable NPCs, like merchants, are not altered.)

See also #729.

[Stanzilla]

thank you!