Optimize some components

- Use binding of this over `document.querySelector` calls
- Use else if over a chained else and if condition

src/organisms/Pagination.svelte

@@ -54,12 +54,10 @@
     </div>
     <p class="pagination__caption style-caps">See more photos</p>
 
-    {:else}
-    {#if $currentLocation}
+    {:else if $currentLocation}
     <div class="pagination__message">
         <h3>That's all folks!</h3>
         <p class="pagination__caption style-caps">Come back later to check out <br>new photos of {$currentLocation.name}</p>
     </div>
     {/if}
-    {/if}
 </section>