Subtitle editor, overlapping UI elements

[cgruber-uos]

The UI text "Vorschaumodus" is overlapped by the subtitle add / delete function. And the milliseconds of the total playing time is cropped by the browsers size:

Special for my resolution (1440 px width) or a general problem?

[Arnei]

Not a problem with that specific resolution. The editor is not highly optimized for small-ish resolutions and/or high zoom levels.

The "preview mode" text overlapping with the list on the left should at least be fixed by #908.