[Andrew] Banned Users List 1.2.0

FIXED: Fixed syntax used to display only date and not include time

• Added recent ban widget with controls on numbers of entries to show and whether to hide users banned for spam
• Removed unused code left in template that made add-on incompatible with 2.1.x
  • I had been working on adding filters when I decided to release version 1.0.6, which gave the option to hide spam users. I plan on adding filters to the list but it will likely be around December when this occurs

• Updated option to hide spam users to include users banned for the following phrases
  • spam_cleaner_ban_reason (Spam. Please contact the administrator if this was done in error.)
  • spam
  • This is needed for situations where the xf_spam_cleaner_log is truncated or spam is listed as the reason

• Added option in admin panel to hide users banned by spam cleaner

• Removed H3 for username so username will not match the font size of other text on the row

• Added permission that restricts which user groups can view the "Banned by" column