Edit notes don't load correctly for stash commits and reflog dialog

What steps will reproduce the problem?

1. Open the Edit Notes dialog for a stash commit (from Stash List).
2. Fill in some content and confirm. Then, ok or cancel for Stash List dialog.

What is the expected output? What do you see instead?

1. When I open the Edit Notes dialog again for this stash commit, the content is empty, like no saved.
2. I see the "Notes added by 'git_note_create' from libgit2" messages in ref:notes/commits, even if notes are modified rather than added.
3. I want to have a Notes column (even if Yes/no) in Stash List dialog. Maybe I should create a separate feature request?

What version of TortoiseGit and Git are you using? On what operating system?

• TortoiseGit 2.7.0.0 (C:\Program Files\TortoiseGit\bin)
• git version 2.20.1.windows.1
• Windows 10