web: data-driven switcher & save mode switcher

also:
- disabled ssr to enable localstorage
- removed the workaround for hover, as it looks bad

web/src/components/buttons/ActionButton.svelte

@@ -3,13 +3,6 @@
     export let click = () => { alert('no function assigned') };
 </script>
 
-<button id={id} class="button" on:click={click}>
+<button id="button-{id}" class="button" on:click={click}>
     <slot></slot>
 </button>
-
-<style>
-    :global(.button.selected) {
-        background: var(--secondary);
-        color: var(--primary);
-    }
-</style>