we know that once a topic has been searched, it disappears from the related screen, however for some objects that can be searched multiple times this is not the case, they become highlighted in white but continue to be present, in some mods like xpiratez it can be inconvenient because the player could search for them again without realizing it; in fact you should not play with the tech tree viewer activated because it is a kind of cheat, so why not make these topics disappear automatically once they are exhausted?
Or have an option to highlight them in another color so that they can be sold?
Thanks
see screenshot attached, to get an example of what i mean