[ubuntu_studio] Thunar (so Xubuntu as well?) behaviour changed

Since updating from 14.04 to 16.04, and thus from Thunar 1.6.3 to 1.6.10, there has been a couple of changes in the way that Thunar work that really impinge on my work flow!

1. No longer possible to select multiple files by dragging from over the filename. It still works if dragging is done from white space if in Icon or Compact view, or from a column other than filename in Detailed view, but then not the white space below in Detailed. (I always used Detailed List and have it set to auto-expand the column so sometimes it can end up wider that the window. Plus it really slows me down have to think where to start dragging from! This is the more aoying niggle.)

2. No longer possible to do a RMB drag and drop. There used to be a time within if you started to move the mouse of right clicking you could drag and then get the menu options to Move/Copy/Link/Cancel on release. This is no longer possible.

My searching for possible solutions seemed to imply it could be related to GTK themes but I am ruing the same theme on both installs under Appearance and have tried multiple under the Windows Manager option (the same as I have on 14.04 isn't listed) and nothing made any difference.

Is there any way to restore these operations?