any change of opts needs to invaldiate cache

internal/js/files_support.js

@@ -700,10 +700,8 @@ function isMobile() {
 // when we change one of the options (noo, how_many, folders) - then update '{how_many} files' str,
 // tweak noo menu for folders/flat view then reset the page contents based on current OPT values
 function changeOPT(successCallback) {
-    var old_how_many=OPT.how_many
     OPT.how_many=$('#how_many').val()
-    // if we change how_many invalidate page cache as page size is different now
-    if( OPT.how_many != old_how_many )
+    // changes invalidate page cache so clear it out
     document.page.length=0
     new_f=$('#folders').val()
     new_f=( new_f == 'True' )