Support image operations with Imagick extension (#1489734)
Add comment about behavior with empty im_*_path
Reset search when swicthing folders to meet common expecations
Don't use $HTTP_RAW_POST_DATA deprecated in PHP 5.6
Add 'performance_stats' option, so perf. stats can be logged with disabled devel_mode
Allow data-* attributes (#1489860)
Remove unused 'foldertray' container