Fix sort order of articles on app restart

When restarting the app, now the articles get sorted in the way they
were ordered before. This is done by not only checking the
savedInstanceState for sorting order but also the settings.

Close wallabag#797
Close wallabag#781
Close wallabag#713

app/src/main/java/fr/gaulupeau/apps/Poche/ui/RecyclerViewListFragment.java

@@ -18,6 +18,7 @@
 import java.util.List;
 
 import fr.gaulupeau.apps.InThePoche.R;
+import fr.gaulupeau.apps.Poche.data.Settings;
 
 public abstract class RecyclerViewListFragment<T> extends Fragment
         implements Sortable, Searchable {
@@ -59,7 +60,16 @@ public void onCreate(Bundle savedInstanceState) {
                 searchQuery = savedInstanceState.getString(STATE_SEARCH_QUERY);
             }
         }
-        if(sortOrder == null) sortOrder = Sortable.SortOrder.DESC;
+
+        if(sortOrder == null) {
+            // Try getting sortOrder from settings
+            if(this.getContext() != null) {
+                Settings settings = new Settings(this.getContext());
+                sortOrder = settings.getListSortOrder();
+            } else {
+                sortOrder = Sortable.SortOrder.DESC;
+            }
+        }
 
         itemList = new ArrayList<>();