Add access controls window

svelte/src/layout/ToggleButton.svelte

@@ -0,0 +1,30 @@
+<script lang="ts">
+export let on = false
+export let group_first = false
+export let group_middle = false
+export let group_last = false
+</script>
+
+<button
+	on:click={() => on = !on}
+	type="button"
+	class="button"
+	class:button_highlight={on}
+	class:group_first
+	class:group_middle
+	class:group_last
+>
+	{#if on}
+		<i class="icon">check</i>
+	{:else}
+		<i class="icon">close</i>
+	{/if}
+
+	<slot></slot>
+</button>
+
+<style>
+.button {
+	flex: 0 0 content;
+}
+</style>