Default enable double tap to mark read

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -3026,7 +3026,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                             .putExtra("filter_archive", !EntityFolder.ARCHIVE.equals(message.folderType))
                             .putExtra("found", viewType == ViewType.SEARCH);
 
-                    boolean doubletap = prefs.getBoolean("doubletap", false);
+                    boolean doubletap = prefs.getBoolean("doubletap", true);
 
                     if (!doubletap ||
                             message.folderReadOnly ||

app/src/main/java/eu/faircode/email/FragmentOptionsBehavior.java

@@ -447,7 +447,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
         swQuickFilter.setChecked(prefs.getBoolean("quick_filter", false));
         swQuickScroll.setChecked(prefs.getBoolean("quick_scroll", true));
 
-        swDoubleTap.setChecked(prefs.getBoolean("doubletap", false));
+        swDoubleTap.setChecked(prefs.getBoolean("doubletap", true));
         swSwipeNav.setChecked(prefs.getBoolean("swipenav", true));
         swVolumeNav.setChecked(prefs.getBoolean("volumenav", false));
         swReversed.setChecked(prefs.getBoolean("reversed", false));