Update some font sizes and weights

packages/builder/src/components/design/Panel.svelte

@@ -23,7 +23,7 @@
       <Icon name={icon} />
     {/if}
     <div class="title">
-      <Heading size="XS">{title || ""}</Heading>
+      <Heading>{title || ""}</Heading>
     </div>
     {#if showExpandIcon}
       <Icon
@@ -81,6 +81,7 @@
     font-weight: 600;
     text-overflow: ellipsis;
     white-space: nowrap;
+    font-size: 15px;
   }
   .add-button {
     flex: 0 0 30px;

packages/builder/src/pages/builder/app/[application]/_layout.svelte

@@ -122,7 +122,7 @@
         <Heading size="S">{$store.name || "App"}</Heading>
       </div>
       <div class="topcenternav">
-        <Tabs {selected} size="M">
+        <Tabs {selected} size="L">
           {#each $layout.children as { path, title }}
             <Tab
               quiet
@@ -198,7 +198,7 @@
     margin-bottom: -2px;
   }
   .topcenternav :global(.spectrum-Tabs-itemLabel) {
-    font-weight: bold !important;
+    font-weight: 600;
   }
 
   .toprightnav {