page_rules/page_rules - Update page rules left

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Based on how many page rules are left, either show the "Add Page Rule" interface or the "Buy More Page Rules" interface.

Since the native interface has some sort of modal that works with payment/membership, consider finding a landing page to link to.

[null93]

Also find landing page for "Buy More Page Rules" in wrapper_left. Native UI shows modal with payment/membership options.

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Found this link to link to: https://support.cloudflare.com/hc/en-us/articles/225894428-How-To-Buy-Additional-Page-Rules