A couple fixes to Dialog

Quickfix for SSR
Let it take open from OpenClose context properly

src/lib/components/dialog/Dialog.svelte

@@ -5,6 +5,7 @@
     createEventDispatcher,
     tick,
     onDestroy,
+    onMount,
   } from "svelte";
   export enum DialogStates {
     Open,
@@ -62,7 +63,8 @@
   let containers: Set<HTMLElement> = new Set();
   let openClosedState: Writable<State> | undefined = getContext("OpenClosed");
 
-  $: open =
+  $: {
+    open =
       open === undefined && openClosedState !== undefined
         ? match($openClosedState, {
             [State.Open]: true,
@@ -84,6 +86,7 @@
         `You provided an \`open\` prop to the \`Dialog\`, but the value is not a boolean. Received: ${open}`
       );
     }
+  }
 
   $: dialogState = open ? DialogStates.Open : DialogStates.Closed;
   $: visible =
@@ -148,11 +151,14 @@
     $api.close();
   }
 
+  let mounted = false;
+  onMount(() => (mounted = true));
   $: _cleanupScrollLock = (() => {
     if (_cleanupScrollLock) {
       _cleanupScrollLock();
     }
     if (dialogState !== DialogStates.Open) return;
+    if (!mounted) return;
 
     let overflow = document.documentElement.style.overflow;
     let paddingRight = document.documentElement.style.paddingRight;