make sure we setup the scroll direction at main screen from the main thread

app/src/main/kotlin/com/simplemobiletools/gallery/pro/activities/MainActivity.kt

@@ -986,10 +986,10 @@ class MainActivity : SimpleActivity(), DirectoryOperationsListener {
                 setupZoomListener(mZoomListener)
                 runOnUiThread {
                     directories_grid.adapter = this
+                    setupScrollDirection()
                 }
             }
             measureRecyclerViewContent(dirsToShow)
-            setupScrollDirection()
         } else {
             if (textToSearch.isNotEmpty()) {
                 dirsToShow = dirsToShow.filter { it.name.contains(textToSearch, true) }.sortedBy { !it.name.startsWith(textToSearch, true) }.toMutableList() as ArrayList