Desktop: Fix All notes note list update bugs.

[miciasto]

This PR fixes a couple of small update bugs in the All Notes list. Tests added.

Note list not updated when note is duplicated in All notes

To reproduce:

1. Create two folders (A and B) with a note N in folder A
2. Selected folder B in sidebar
3. Select All notes in sidebar
4. Duplicate note N

Expected: the new duplicate note appears in the All notes note list
Actual: nothing. The note is duplicated but does not appear.

Note disappears from note list when dragged from All notes to a new parent

To reproduce:

1. Create two folders (A and B) with a note N in folder A
2. Select All notes in Sidebar
3. Drag note N to folder B in sidebar

Expected: the note remains visible in the All notes note list
Actual: the note disappears from the note list.

[tessus]

We should merge this.

[laurent22]

Looks good, thanks @mic704b!