missing or corrupt srt file - still should be able to render the rest of the OSD

[roycruse]

Is there an existing feature request for this?

• [X] I have searched the existing open and closed issues

Feature description

One of my video files of my flight today no matter how many times I try the osd tool would not open up srt file despite opening the mp4 and osd files fine. This meant the "Start Render" button was not enabled.

If i have seleced none of the fields from the SRT file anyway why not allow the file to render even if the srt file will not load or is missing or corrupt, etc (for whatever reason).