Opened files optimization

When working with lots of files it's not really comfortable to pick the file you need from the dropdown at the right top corner. Is it possible to add little button above the file list "show only opened files". So it will easier to find a file you need at the moment. Another nice option for this topic would be have ability to group files in opened files tab by "path" (with configurable depth) and "type", maybe also with other groupings which aren't coming to head right now.