escape apostrophes in prefix/suffix on move existing which fixes BUG-116

internal/js/files_support.js

@@ -60,7 +60,10 @@ function GetExistingDirsAsDiv( dt, divname, ptype )
                 else
                     vis = ''
                 s+= '<button class="btn btn-outline-primary move_'+item.ptype+ ' ' + vis + '" '
-                s+= 'onClick="$(\'#prefix\').val(\''+item.prefix+'\'); $(\'#suffix\').val(\''+item.suffix+'\');return false;">'+item.prefix+item.suffix+'</button>'
+                    s+= 'onClick="$(\'#prefix\').val(\''+item.prefix.replace("\'","\\\'")+'\'); '
+                        s+='$(\'#suffix\').val(\''+item.suffix.replace("\'","\\\'")+'\');return false;">'
+                    s+=item.prefix+item.suffix
+                    s+='</button>'
             } )
             if( s == '' )
                 $('#existing').html('')