web: improve screen reader usability

- switchers now have audible states
- toggles are now interpreted as toggles
- fixed weird spacing introduced in last commit

web/src/components/buttons/SettingsToggle.svelte

@@ -23,6 +23,7 @@
 <div id="setting-toggle-{settingContext}-{String(settingId)}" class="toggle-parent">
     <button
         class="toggle-container"
+        aria-pressed={isEnabled}
         on:click={() =>
             updateSetting({
                 [settingContext]: {