SRGTimeSliderDelegate should tell if isMovingToPlaybackTime is passive or not

[pyby]

Issue overview

• [ ] Incorrect behavior
• [X] Feature request
• [ ] Crash
• [ ] Help / documentation
• [ ] Other: classification

Description of the request

When seeking with -seekToTime:withToleranceBefore:toleranceAfter:completionHandler: several times, the SRGTimeSliderDelegate called each time on -timeSlider:isMovingToPlaybackTime:withValue:interactive:, but we don't know if this call is from a normal playback, or with a coded seek.

It could be great to have this informations. -timeSlider:isMovingToPlaybackTime:withValue:interactive:forced: ?

• Library version: current develop branch 2.0

• [X] Always reproducible

• [ ] Difficult to reproduce

Code sample

On our private project SRGLetterbox