Use generic bg executor for LT and DeepL

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

@@ -2756,6 +2756,8 @@ public class FragmentCompose extends FragmentBase {
 
                         @Override
                         protected void onExecuted(Bundle args, DeepL.Translation translation) {
+                            if (etSubject == null)
+                                return;
                             etSubject.setText(translation.translated_text);
                         }
 
@@ -2763,7 +2765,7 @@ public class FragmentCompose extends FragmentBase {
                         protected void onException(Bundle args, Throwable ex) {
                             Log.unexpectedError(getParentFragmentManager(), ex, !(ex instanceof IOException));
                         }
-                    }.serial().execute(FragmentCompose.this, args, "compose:translate");
+                    }.execute(FragmentCompose.this, args, "compose:translate");
                 } else {
                     final Pair<Integer, Integer> paragraph = StyleHelper.getParagraph(etBody);
                     if (paragraph == null)
@@ -2890,7 +2892,7 @@ public class FragmentCompose extends FragmentBase {
                             etBody.setSelection(paragraph.second);
                             Log.unexpectedError(getParentFragmentManager(), ex, !(ex instanceof IOException));
                         }
-                    }.serial().execute(FragmentCompose.this, args, "compose:translate");
+                    }.execute(FragmentCompose.this, args, "compose:translate");
                 }
             }
         });
@@ -2970,7 +2972,7 @@ public class FragmentCompose extends FragmentBase {
                     Log.unexpectedError(getParentFragmentManager(), exex, false);
                 }
             }
-        }.serial().execute(this, args, "compose:lt");
+        }.execute(this, args, "compose:lt");
     }
 
     private void onActionRecordAudio() {

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

@@ -409,6 +409,8 @@ public class LanguageTool {
     }
 
     static void applySuggestions(EditText etBody, int start, int end, List<Suggestion> suggestions) {
+        if (etBody == null)
+            return;
         Editable edit = etBody.getText();
         if (edit == null)
             return;