Please make online preview filetypes update resitant

Hello,

I currently updated from Seafile 6.0.3 to 6.0.5 (Raspberry). At the old version, I added some filetypes to the online previewlist (At the block PREVIEW_FILEEXT in the file seafile-server-latest/seahub/seahub/utils/__init__.py). For example *.m files for Matlab.

When updating the server to the new version, the init file is replaced by a new one and my own filetypes are lost.

Is it possible that the filelist ist saved through the update or might be even possible the set the filetypes in the seahub admin settings section?

Thank you!