For view_reading_list event in the reading list A/B experiment, we send article_source 'top_right' (for desktop)
For mobile, it needs to be:
```
action: click
action_subtype: view_reading_list
action_source: user_menu
```
Based on mobile instrument spec in Jennifer's spreadsheet.
While working on this, we discovered that view_reading_list click events are not sent when the bookmarkList is collapsed into the user menu. We want to include a fix for that here.
=== BDD
- For QA engineer to fill out
=== Test Steps
- For QA engineer to fill out
== Design
N/A
== Acceptance criteria
[ ] user in the reading list treatment group clicks on the "Saved pages" when collapsed into the user menu on Vector 2022, a click event is fired with:
[] or user in the reading list treatment group clicks on the "Saved pages" on Minerva in the top left menu (non-advanced), a click event is fired with:
[] or user in the reading list treatment group clicks on the "Saved pages" on Minerva in the top right user menu (advanced), a click event is fired with:
```
action: click
action_subtype: view_reading_list
action_source: user_menu
```
[ ] user in the reading list treatment group clicks on the "Saved pages" when not collapsed into the user menu on Vector 2022 (e.g. in toolbar at top right of the page), a click event is fired with:
```
action: click
action_subtype: view_reading_list
action_source: top_right
```
NOTE: we decided with Jennifer that article_count is not needed for this event.