User Essentials 4.5.6

• Fix "Received invalid UTF-8 for string column [ip_address]"
• Fix per user message/threads per page so it actually works.
  • Deleting useress_messagesPerPage or useress_threadsPerPage custom fields immediately stops applying the custom per-page quantities.
  • Use Custom User Fields Permissions to control who can use these custom fields.

• Fix "custom upgrade amount" when only 1 payment profile is configured
• Add "Custom upgrade amount minimum" option
• Add "Custom upgrade amount maximum" option
• Custom payment amount must be between 0.01 and 999.99 (inclusive) and rounded to 2 decimal points, this is to ensure compatibility with payment providers that XenForo natively supports