Avoid Trash.*identifier*
Remove _combineVarsAsGuids
WIP: Add Lamdu.Expr.UniqueId, start removing Trash
tagGId -> tagVal
Sugar.Tag now has tagInstance guid, RecordEdit uses that instead of augmenting the id on its own
Don't translate to a Guid unnecessarily before calling getStoredName
assocNameRef: Don't unnecessarily convert to guid first
TagEdit, AddNames: Remove Trash
Sugar.Convert.{Apply,Hole}: Remove Trash
Remove Trash