long filenames - marquee and ellipsizing or truncating position

**Is your feature request related to a problem? Please describe.**
long filenames currently get ellipsized with three dots (...) in the middle.
also the file type ending is missing (.txt, .png and so on)
because of that it is in many cases impossible to identify the correct file, as you can see here:


**Describe the solution you'd like**
i'd like to have a choice wether the filenames
- are shown as a marquee
- ellipsized in the middle (as is)
- ellipsized/truncated at the end
- ellipsized/truncated at the beginning

also there should be an option to show the filetype.

**Describe alternatives you've considered**
though not an optimum solution, the font size in the three-dot-context menu could be reduced to show more information, currently it's unneccesarily big (at least the filetype is shown here):