Add icon on approvals which allows to view all activities for approval.

Clicking the icon will open the activity list filtered for the selected approval.
A link back to the approval list will be available, allowing users to return to the previous view with all previously selected filters preserved.

In the activity list, the approval name filter will contain the name of the selected approval and cannot be changed. The only available action will be to remove it and set a different one.

After modifying the filter, the option to return to the previous page will no longer be available.