Feature: Highlighting the current subtitle in the table

[mschmidm]

First of all, thank you for the nice app!

Is your feature request related to a problem? Please describe.
When using Gaupol to edit/correct/improve an existing subtitle file I often let the video play until I spot an error. Unfortunately, I then often find myself losing track of the currently playing subtitle in the editor table.

Describe the solution you'd like
The subtitle played at that moment could be highlighted somehow, either the whole row or just a small indicator like a colored circle in the first column.

Describe alternatives you've considered
Another option could be to always scroll the current subtitle into view (e.g. the middle of the editor) and thus indirectly show which subtitle is currently playing. But I think that would be much more work and less effective.

[otsaloma]

I think this is a matter where people have varying preferences, so I didn't do anything fancy there. But, maybe you missed it, there's in the menu Edit / Selection / Previous From Video Position (and similarly Next...) bound to Ctrl+Y and Ctrl+U, which will jump the selection and scroll the view to right before of after the current video position.