Add modal option to hide divider, and make title rendering optional

packages/bbui/src/Modal/ModalContent.svelte

@@ -15,6 +15,7 @@
   export let showCloseIcon = true
   export let onConfirm = undefined
   export let disabled = false
+  export let showDivider = true
 
   const { hide, cancel } = getContext(Context.Modal)
   let loading = false
@@ -41,11 +42,17 @@
   aria-modal="true"
 >
   <div class="spectrum-Dialog-grid">
-    <h1 class="spectrum-Dialog-heading spectrum-Dialog-heading--noHeader">
-      {title}
-    </h1>
-
-    <Divider size="M" />
+    {#if title}
+      <h1
+        class="spectrum-Dialog-heading spectrum-Dialog-heading--noHeader"
+        class:noDivider={!showDivider}
+      >
+        {title}
+      </h1>
+      {#if showDivider}
+        <Divider size="M" />
+      {/if}
+    {/if}
     <!-- TODO: Remove content-grid class once Layout components are in bbui -->
     <section class="spectrum-Dialog-content content-grid">
       <slot />
@@ -96,6 +103,9 @@
   .spectrum-Dialog-heading {
     font-family: var(--font-sans);
   }
+  .spectrum-Dialog-heading.noDivider {
+    margin-bottom: 12px;
+  }
 
   .spectrum-Dialog-buttonGroup {
     gap: var(--spectrum-global-dimension-static-size-200);