Edit all visible mappings at once

* Prototype switching table to an editable form
* Type still toggles fields, special archive and suggested URLs are
intentionally left out
* Behaves like a mode, switch to edit mode to change mappings
Create an 'add multiple urls' field

* Add many new mappings at once prototype
* Create a review page to confirm these changes
Prototype two column edit with toggles

* Use a single toggle button to switch between archive and redirect
* Autofocus redirect field on toggle
* Put old and new URLs side by side
* Leads to problematic wrapping of long URLs and hidden content in
shorter text input
* Button text is confusing
Alternative hover on edit prototype

* Show form fields on hover
* Feels jarring
Prototype checkboxes and modals

* Select paths to edit using easy to hit checkboxes
* Click archive or redirect to edit the mappings
* Opens modal with details and confirmation
Tidy up modal prototype

* Move action buttons into table header
* Style modal contents as a bootstrap table
* Add a non-functional check-all checkbox
Refine checkbox prototype

* Simulate a check-all event
* Put Add mapping button back
Try two types of path filter

* Search old paths and new URLs
Tweak button text and column widths
Refine bulk add UI

* Improve the review changes screen
* Include a complete breadcrumb example
* Use a table that better matches the bulk edit UI