Fix Clipboard Block On Collection Version Delete
Fix Clipboard Block On Collection Version Delete

Fix Clipboard Block On Collection Version Delete

- Check `btCoreScrapbookDisplay` to make sure block is not pasted from
  clipboad elsewhere on site


Former-commit-id: 3ef854c8e6e50b05a10eb945ca1aa1e0cf5c07dd
biplobice/concrete5,deek87/concrete5,KorvinSzanto/concrete5,biplobice/concrete5,rikzuiderlicht/concrete5,rikzuiderlicht/concrete5,KorvinSzanto/concrete5,deek87/concrete5,olsgreen/concrete5,MrKarlDilkington/concrete5,hissy/concrete5,hissy/concrete5,concrete5/concrete5,triplei/concrete5-8,MrKarlDilkington/concrete5,deek87/concrete5,triplei/concrete5-8,haeflimi/concrete5,MrKarlDilkington/concrete5,acliss19xx/concrete5,rikzuiderlicht/concrete5,a3020/concrete5,concrete5/concrete5,haeflimi/concrete5,hissy/concrete5,mlocati/concrete5,KorvinSzanto/concrete5,concrete5/concrete5,jaromirdalecky/concrete5,mlocati/concrete5,olsgreen/concrete5,biplobice/concrete5,jaromirdalecky/concrete5,biplobice/concrete5,haeflimi/concrete5,mainio/concrete5,a3020/concrete5,haeflimi/concrete5,mainio/concrete5,triplei/concrete5-8,jaromirdalecky/concrete5,acliss19xx/concrete5,mainio/concrete5,mlocati/concrete5,acliss19xx/concrete5,olsgreen/concrete5,mlocati/concrete5,hissy/concrete5,deek87/concrete5,concrete5/concrete5,jaromirdalecky/concrete5