Add max-height limits to topic previews
Use avatar helper for no avatar instead of hard-coding it
Support default browser tooltips with no theme option
Revert no_avatar changes
Use phpbb_get_user_avatar()
Reduce edge detection to within 50 pixels
Remove the v for version in templates for language reasons
Disable unit testing on PHP 5.6
Reduce default hover time to 1 second
Add event vse.topicpreview.display_topic_preview