replace event banner by its blurhash image, add headline picture to EventMetadataSidebar
replace event banner by its blurhash image, add headline picture to EventMetadataSidebar, The headline picture in the sidebar is clickable, like the map, but it suffers the same issue as #866 (closed)
what has been done: watch hash in BlurhashImg.vue, created BlurhashImgWrapper.vue, modivied EventBanner.vue and EventMetadatSidebar.vue
This solves, at least for me, #223 (closed) and #717 (closed) using another approach (blurhash instead of cropping). This is how the event platform resident advisor is doing it.