Adding the Fallback Pool to the Load Balancing UI and other significant UI enhancements

What this post added

This post details significant UI enhancements to the Cloudflare Load Balancing dashboard. Key contributions include: the addition of a visible 'fallback pool' configuration and display, de-modaling of the main Load Balancing page and related sections (monitors, pools) for improved usability, clearer display of shared object dependencies (monitors, pools) with new columns indicating usage, confirmation modals for edits impacting shared objects, and the replacement of ambiguous icon buttons with explicit text buttons ('Edit', 'Delete') to prevent accidental deletions.