screen readers: label button, and remove decorative svg

src/lib/components/AddServerModal.svelte

@@ -162,6 +162,7 @@
 			</h1>
 			<button
 				class="self-center"
+				aria-label={$i18n.t('Close Configure Connection Modal')}
 				on:click={() => {
 					show = false;
 				}}
@@ -170,6 +171,7 @@
 					xmlns="http://www.w3.org/2000/svg"
 					viewBox="0 0 20 20"
 					fill="currentColor"
+					aria-hidden="true"
 					class="w-5 h-5"
 				>
 					<path