[AP] Style Suite 2.16.15

This version hard-requires Xenforo 2.3. It is not compatible with Xenforo 2.2, and support for XF2.2 has ended.

• Improve handling of asset importing during a fresh install
• Rebase username icons off XF2.3's icon system
• Replace Font Awesome picker library
• Create "Optimize assets" rebuild job
• Support WebP for assets
• Rename controller, repository, service classes
• Create app_registry_preload listener to optimize registry queries
• Run enqueuePostUpgradeCleanUp() in postUpgrade() setup step
• Replace shortnames with class strings
• Simplify post, postbit, tooltip preview templates
• Update templates to use XF2.3's macro syntax
• Rewrite jQuery in vanilla Javascript

• Stop bundling /tools directory
• Make ap_ss_ignored_user_style nullable

• Change "content" column of profile blocks to mediumtext
• Fix Call to undefined method FormAction::run()
• Fix regression where a user with an uploaded postbit background image or username icon could not be deleted

• Create "Disable animated glows" user preference option
• Fix regression where a users' style could be passed on to the admin editing whos editing the user
• Fix Attempted to convert NULL to string/binary [icon]

• Gracefully reject incorrectly formatted default bbcodes
• Fix issue where removing permissions would only restrict the user from accessing the settings page, when it should also stop the style from applying
• Remove "Sparkle width" style property as its no longer necessary
• Remove "Postbit display type" style property as its no longer necessary
• Fix Attempt to read property "post_style" on null
• Re-enable previews

• (Hopefully) fix issue where default post font size could be different in certain circumstances
• Fix various issues with UserStyleImage service
• Fix Undefined array key "XF:User[7044]" when trying to delete a user
• Fix issue where editing a users styles from the Admin Panel can actually pass those same styles on to your user account
• Disable previews until jQuery -> JS port is complete

• Fix Class apathy\StyleSuite\Service\Admin\Image does not exist when deleting an asset
• Fix Argument #1 ($color) must be type of string, array given when choosing selectable usergroup colors
• Fix Class apathy\StyleSuite\Service\Admin\AvatarFrame does not exist during a fresh install

• Fix Undefined array key: apSsDisableAvatarFrameStyles

• Fix undefined index error during a rebuild of the asset cache

This update was originally planned to be a port of the jQuery code to vanilla Javascript in preparation for XF2.3, but it's been postponed until the next version to address some bug reports and perform some cleanups.

• Improve overall abstraction
• Improve overall reliability when upgrading from versions as old as 2.7.1
• Fix Call to undefined method apathy\StyleSuite\Setup::hasAddonInstalled() during the upgrade process
• Improve Siropu Chat 2 user tagging fix as it could cause the chat to stop working in certain instances