Directory section should be displayed by default in Messages when recents list is empty.

related to https://github.com/vector-im/vector-ios/issues/358

Vector/Model/RoomList/PublicRoomsDirectoryDataSource.m

@@ -50,10 +50,6 @@ double const kPublicRoomsDirectoryDataExpiration = 10;
         _searchPatternsList = newSearchPatternsList;
         [self refreshPublicRooms];
     }
-    else if (!newSearchPatternsListString)
-    {
-        [self refreshPublicRooms];
-    }
 }
 
 - (NSIndexPath*)cellIndexPathWithRoomId:(NSString*)roomId andMatrixSession:(MXSession*)matrixSession
@@ -75,8 +71,6 @@ double const kPublicRoomsDirectoryDataExpiration = 10;
     return indexPath;
 }
 
-#pragma mark - Private methods
-
 - (void)refreshPublicRooms
 {
     // Do not refresh data if it is not too old
@@ -151,6 +145,8 @@ double const kPublicRoomsDirectoryDataExpiration = 10;
     }
 }
 
+#pragma mark - Private methods
+
 - (void)refreshFilteredPublicRooms
 {
     // Apply filter if any