fix highlighting issue - as expected, ecnt was wrong

internal/js/files_support.js

@@ -505,13 +505,14 @@ function drawPageOfFigures()
         }
         // back button, if gray/back decide if we see grayed out folder and/or the name of the folder we go back to
         html=`<div class="col col-auto g-0 m-1">
-                <figure id="${document.back_id}" class="${cl} entry m-1" type="Directory">
+                <figure id="${document.back_id}" ecnt="0" class="${cl} entry m-1" type="Directory">
                     <svg class="svg" width="${OPT.size-22}" height="${OPT.size-22}">
                         <use xlink:href="internal/icons.svg#folder_back${gray}"/>
                     </svg>
                     <figcaption class="figure-caption text-center">${back}</figcaption>
                 </figure>
              </div>`
+        ecnt++
         /*
             <script>f=$('#_back'); w=f.find('svg').width(); f.find('figcaption').width(w);</script>
         */