Fix note content displayed when viewing an older version of the note

Steps to reproduce:

1. Create a note manually.
   -> Note version is 0.1. Note content is empty.
2. Type some content to the note and save.
   -> Note version is 0.2.
3. Click on v0.1 in the version pill.
   => v0.2 content is displayed.
4. Refresh page.
   -> v0.1 content (i.e. empty note) is displayed.