Force 3/2 format for non landscape photos on Location page

Center image on a background when square, portrait or other ratio
- Fix MutuationObserver for using components (would think a component is an item)

src/components/molecules/House.svelte

@@ -9,6 +9,7 @@
     export let photoAlt: string
     export let title: string
     export let index: string
+    export let orientation: string = undefined
     export let date: string = undefined
     export let city: string = undefined
 </script>
@@ -28,7 +29,9 @@
         </p>
     </div>
 
-    <figure class="house__photo">
+    <figure class="house__photo"
+        class:not-landscape={orientation && orientation !== 'landscape'}
+    >
         <a href={url} sveltekit:noscroll tabindex="0">
             <Image
                 id={photoId}