Default one preview line

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

@@ -6847,7 +6847,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         this.flags_background = prefs.getBoolean("flags_background", false);
         this.preview = prefs.getBoolean("preview", false);
         this.preview_italic = prefs.getBoolean("preview_italic", true);
-        this.preview_lines = prefs.getInt("preview_lines", 2);
+        this.preview_lines = prefs.getInt("preview_lines", 1);
         this.message_zoom = prefs.getInt("message_zoom", 100);
         this.attachments_alt = prefs.getBoolean("attachments_alt", false);
         this.thumbnails = prefs.getBoolean("thumbnails", true);

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

@@ -597,6 +597,9 @@ public class ApplicationEx extends Application
         } else if (version < 1847) {
             if (Helper.isAccessibilityEnabled(context))
                 editor.putBoolean("send_chips", false);
+        } else if (version < 1855) {
+            if (!prefs.contains("preview_lines"))
+                editor.putInt("preview_lines", 2);
         }
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && !BuildConfig.DEBUG)

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

@@ -1412,7 +1412,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
         swPreview.setChecked(prefs.getBoolean("preview", false));
         swPreviewItalic.setChecked(prefs.getBoolean("preview_italic", true));
         swPreviewItalic.setEnabled(swPreview.isChecked());
-        spPreviewLines.setSelection(prefs.getInt("preview_lines", 2) - 1);
+        spPreviewLines.setSelection(prefs.getInt("preview_lines", 1) - 1);
         spPreviewLines.setEnabled(swPreview.isChecked());
 
         swAddresses.setChecked(prefs.getBoolean("addresses", false));