stats page: Enlarge button doesn't change to 'shrink' after clicked

[simon987]

sist2 version: 2.8.2

Also, the "Enlarge" text zooms into an image, but it still shows "Enlarge" after, when you zoom out - small thing - but maybe change it to "Enlarge", then "Shrink" etc.

[simon987]

Fixed in 9587cad