This is a really cool idea and I'd like to do it. Let me look into this and get back to you.

Visit "State At" under Properties to see state colors persist after slider is released.

This is something hotly debated and IUPAC currently has a task force headed up by Eric Scerri dedicated to finding an answer: https://iupac.org/projects/project-details/?project_nr=2015-039-2-200

I recently heard from higher ups at IUPAC that a resolution is not immediately forthcoming. There are a lot of merits to including Lu/Lr inline, which you discussed, but there are also drawbacks. Since I’m not a top academic in this area, I defer to standards bodies and their deliberation process rather than injecting my own original research or opinions. For now, I simply mirror the layout here: https://iupac.org/what-we-do/periodic-table-of-elements/

If that changes, I will not be far behind.

Tell me more!

This has been implemented.

It is coming in the redesign!

This has been implemented for free. Install away!

Tell me more about what you dislike and what changed and I'll do what I can to improve it.

Old group numbers were scrapped by IUPAC 30 years ago because America had
one and Europe had another and they were contradictory. That would be very
confusing for an international audience as VA is group 15 in the USA and
group 4 in the EU.

Select the Orbitals tab and in place of atomic weight will be common charges. Below the closeup view of the element will be all charges.

Select the Isotopes tab and click an element and isotopes will fan out with standard atomic notation.