Add a new button beside the "remove page" button that says "assign label"

The new button should be disabled unless one or more checkboxes is clicked, with a hover state saying "please select one or more watched items you want to assign labels to"

When the new button is clicked, if one or more checkboxes are clicked, show a modal containing

• all labels with checkboxes beside them
• text saying "select the labels you want assigned to ..." and then a list of the first 3 page titles, plus the number of other pages that will be affected
• an "assign" button to confirm the assignment
• a "cancel" button for closing the modal without action

Actually assigning the labels is covered by the parent task