Small improvements

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

@@ -43,8 +43,18 @@ public class FragmentFolders extends FragmentEx {
     private Group grpReady;
     private FloatingActionButton fab;
 
+    private long account;
     private AdapterFolder adapter;
 
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Get arguments
+        Bundle args = getArguments();
+        account = (args == null ? -1 : args.getLong("account"));
+    }
+
     @Override
     @Nullable
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
@@ -89,10 +99,6 @@ public class FragmentFolders extends FragmentEx {
     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
 
-        // Get arguments
-        Bundle args = getArguments();
-        long account = (args == null ? -1 : args.getLong("account"));
-
         DB db = DB.getInstance(getContext());
 
         // Observe account