Please makes it optionally possible to calculate the height for each slide

[acwolff]

@sachinchoolur, in the documentation you say:

Note - Changing the position of the media on every slide transition creates a flickering effect. Therefore, the height of the caption is calculated dynamically, only once based on the first slide caption.

I don't like this:

If the first slide caption is rather long, you get a lot of space below the slide for a next slide without a caption or a short caption and you get an overlapping caption if a slide has a longer caption as used for the first slide, as you can see in this test album, where allowMediaOverlap: false, and defaultCaptionHeight is not set (what I normally do).

So my request is: makes it optionally possible to calculate the caption height for each slide or apply a correction factor with the relative caption length with respect to the first calculated height if the flickering is a big problem.