fix a glitch at empty screen with direct subfolder grouping

app/build.gradle

@@ -62,7 +62,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:5.20.3'
+    implementation 'com.simplemobiletools:commons:5.20.4'
     implementation 'com.theartofdev.edmodo:android-image-cropper:2.8.0'
     implementation 'androidx.multidex:multidex:2.0.1'
     implementation 'it.sephiroth.android.exif:library:1.0.1'

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

@@ -854,6 +854,10 @@ class MainActivity : SimpleActivity(), DirectoryOperationsListener {
         }
 
         val dirs = getSortedDirectories(newDirs)
+        if (config.groupDirectSubfolders) {
+            mDirs = dirs.clone() as ArrayList<Directory>
+        }
+
         var isPlaceholderVisible = dirs.isEmpty()
 
         runOnUiThread {