fix BUG-125: right-click changes highlight if its not in the highlight set

BUGs

@@ -1,10 +1,6 @@
 ### Next: 146
 BUG-143: if I skip next fast enough in files_ip, it can get the warning about changes to entry list... (would have though I disabled next page until loaded)
 BUG-140: When db is restarted underneath PA, it crashes job mgr... It should just accept timeouts, and keep trying to reconnect every 2? mins
-BUG-125: when an image is highlighted, then post the contextmenu on a different image - the highlight does not move to the new image
-         and the selected menu function processes the original or the new depending on the way the code works.
-         There is a chance we need to change the document on click to a mouse down (or whatever the context menu 
-         uses for default), rather than just fix the highlight
 BUG-118: can move files from Bin path, but it leaves the del_file entry for it - need to remove it
 BUG-117: when search returns files that can be deleted and/or restored, the icon stays as delete and tries to delete!
 BUG-106: cant add trudy /pat? as refimgs via FaceDBox

internal/js/files_support.js

@@ -916,6 +916,12 @@ $.contextMenu({
     selector: '.entry',
     itemClickEvent: "click",
     build: function($triggerElement, e) {
+        // if we are not in the highlight set, then move the highlight to this element
+        if( ! $(e.currentTarget).is('.highlight') )
+        {
+            $('.highlight').removeClass('highlight');
+            $(e.currentTarget).addClass('highlight')
+        }
         // when right-clicking & no selection add one OR deal with ctrl/shift right-lick as it always changes seln
         if( NoSel() || e.ctrlKey || e.shiftKey )
         {