Top footer in toolkit v3

[nhjohnstone]

change twitter to x? toolkit has both?

New social media icons:

Pinterest
Snapchat
Weibo
WhatsApp
X

for primary unit, should we use secondary_site_title or footer_address_unit - both are in the current footer

removed google translate

removed legal notices area except login link - where should this go?

left deprecated "il-footer" classes because I'm not sure what is happening with these existing regions

Questions for theme setting form - do we need Unit name, or use secondary site title?
Do we need Footer Menu Third and Fourth? There doesn't seem to be a column area for those anymore
add new social icons or maybe make it a list field?