fix(web): highlight thumbnail select icon on button hover (#31974)

fix(web): highlight thumbnail select icon on button hover (#31972)

(cherry picked from commit 85a09e42e530490f902a02ca97c8fd8dfdaa2c80)

Co-authored-by: Mees Frensel <33722705+meesfrensel@users.noreply.github.com>

web/src/lib/components/assets/thumbnail/Thumbnail.svelte

@@ -395,7 +395,7 @@
       <button
         type="button"
         onclick={onIconClickedHandler}
-        class={['absolute z-2 p-2 focus:outline-none', { 'cursor-not-allowed': disabled }]}
+        class={['group/select absolute z-2 p-2 focus:outline-none', { 'cursor-not-allowed': disabled }]}
         role="checkbox"
         tabindex={-1}
         aria-checked={selected}
@@ -408,7 +408,7 @@
             <Icon data-icon-select icon={mdiCheckCircle} size="24" class="text-primary" />
           </div>
         {:else}
-          <Icon data-icon-select icon={mdiCheckCircle} size="24" class="text-white/80 hover:text-white" />
+          <Icon data-icon-select icon={mdiCheckCircle} size="24" class="text-white/80 group-hover/select:text-white" />
         {/if}
       </button>
     {/if}