feat: allow to delete the last note

[TopFox]

Type of change(s)

• Bug fix
• Feature / enhancement
• Infrastructure / tooling (CI, build, deps, tests)
• Documentation

What changed and why

The menu now always proposes to delete the current note, even if it is the last note.

The function refreshNotes now accepts a null note, in which case it will select the current note as the item 0 of the mNotes list. This note was just created by NotesHelper when it saw that the note list was empty

Before/After Screenshots/Screen Record

On that screenshot, you can see that only one list exists and that the menu option is visible. This was the easy part to fix, but the rest cannot really be shown in a screenshot.

Fixes the following issue(s)

• Fixes Add the possibility to delete the last open note #157

Checklist

• I read the contribution guidelines.
• I manually tested my changes on device/emulator (if applicable).
• I updated the "Unreleased" section in CHANGELOG.md (if applicable).

[naveensingh]

The delete button should still be hidden for the default empty note that appears after all notes are deleted.

Ideally, there would be a placeholder when there are no notes, but this works too!

[TopFox]

The wildcard imports are not from me, should we change this or let detekt fail?

[naveensingh]

See 73eacc5 :)

[naveensingh]

The delete button should still be hidden for the default empty note that appears after all notes are deleted.

I still see it. We can use context.resources.getString(R.string.general_note) and value emptiness to ID the default empty note.

[naveensingh]

When I delete all notes and restart the app once or twice, the Delete note option comes back. No text was added.

[naveensingh]

Looks good, thanks!