feat(interactive_expr): show case tags (#357)
feat(interactive_expr): show case tags (#357)

Also tune styling so that it matches the current tactic state more closely.



digama0/lean,fpvandoorn/lean,fpvandoorn/lean,leanprover-community/lean,dselsam/lean,digama0/lean,fpvandoorn/lean,dselsam/lean,fpvandoorn/lean,dselsam/lean,digama0/lean,leanprover-community/lean,dselsam/lean,fpvandoorn/lean,leanprover-community/lean,leanprover-community/lean,dselsam/lean,fpvandoorn/lean,leanprover-community/lean,digama0/lean,digama0/lean,leanprover-community/lean,digama0/lean,dselsam/lean