The left area of notes list and sidebar cells does not respond to clicks

### Expected
If the whole cell is highlighted when the user hovers above it, the click should select the cell.

### Observed
Recently (it seems so) the segmentation of cells in the note list and sidebar has changed a bit (maybe as a result of accessibility improvements). Now, the hover above the left part of the cell `highlights` the whole cell, but click does not select it (also note the strange rectangle with rounded corners selection at second 6):

https://user-images.githubusercontent.com/73365754/112304685-71677f00-8ca6-11eb-8660-caf64464b926.mov

### Reproduced
1. Have at least one note
2. Move the cursor to the left part of the note (below `pin` button) ~> the whole cell will be `highlighted`, but the click will not select it

^ Same for `Trash`, `All Notes` and `Settings`

### Where did you see the bug
For example in:
- System Make: Parallels Desktop on MBP 16"
- OS: Windows
- OS version: 10 Home 20H2 build 19042.508
- Simplenote app version: 2.9.0-beta1 desktop

Use the issue's reproduction steps in the desktop app, focusing on the note list and sidebar cells and the left area below the pin button. Done means clicking any highlighted part of a note, Trash, All Notes, or Settings cell selects it consistently, without the unexpected rounded selection rectangle.

Written by the indexing model from the issue text.