Fix Range error when turning a tag into a search node

[taramk]

• create a template called #test
• in an empty node, type '#test', hit escape, then try to turn it into a search node
• You'll get an error in the console: "RangeError: Maximum call stack size exceeded."

https://share.getcloudapp.com/KouE4L5Z

[taramk]

verify whether this is fixed when we add a title to search nodes