Tag for entry pages for highlighting them until a condition is completed

[DaFuqs]

Is your feature request related to a problem? Please describe. Spectrum's progression is fairly complex, so I would like to give players small hints where there might be something interesting to discover, still. What would be perfect is a small icon marking the entry that draws attention onto it, that renders until the player found what was there to find.

Describe the solution you'd like Back when using Patchouli, entries supported a tag called turnin, which gave entries an orange dot until an advancement was completed. See the written book entry here:

With Conditions, though, Modonomicon can go quite a bit more fancy instead of just having an advancement check! Maybe even allowing for different dot shapes/colors, like entries support different frame types?