Minimal desgin for the DraCor Moments page

[lehkost]

I standardised all DraCor Moments images to a height of 400 px. I propose adopting this height as the standard. Images within a chapter would then align horizontally next to the preceding image and wrap to a new line once the available width is reached, as they do currently. I would additionally introduce more harmonious horizontal and vertical spacing between images. Finally, I propose displaying the ALT text in a small font beneath each image.