QuickShow: Add gif files to navigation file list

Author: https://github.com/asliturk
Commit: 679702045d
Pull-request: https://github.com/SerenityOS/serenity/pull/1956
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/linusg

Applications/QuickShow/QSWidget.cpp

@@ -84,7 +84,7 @@ void QSWidget::navigate(Directions direction)
         Core::DirIterator iterator(current_dir, Core::DirIterator::Flags::SkipDots);
         while (iterator.has_next()) {
             String file = iterator.next_full_path();
-            if (!file.ends_with(".png")) // TODO: Find a batter way to filter supported images.
+            if (!file.ends_with(".png") && !file.ends_with(".gif")) // TODO: Find a batter way to filter supported images.
                 continue;
             m_files_in_same_dir.append(file);
         }