Don't propagate click events from popover + remove unnecessary overfl…

…ow hidden (#23443)

## Summary & Motivation

1. Don't propagate click events from the popover of ProductTour since by
default blueprint's `Popover` seems to bubble them up to the element its
wrapping (super weird!).
2. Remove overflow: hidden from the AssetPageHeader because this wraps a
button that uses outerglow on hover and the overflow hidden ends up
hiding the outerglow making it look weird.

js_modules/dagster-ui/packages/ui-components/src/components/ProductTour.tsx

@@ -84,7 +84,11 @@ export const ProductTour = ({
       }}
       minimal={false}
       content={
-        <>
+        <div
+          onClick={(ev) => {
+            ev.stopPropagation();
+          }}
+        >
           <div />
           <ProductTourContainer flex={{direction: 'column', gap: 4}} padding={16} style={{width}}>
             <Box flex={{direction: 'column', gap: 8}}>
@@ -95,7 +99,7 @@ export const ProductTour = ({
             {actionsJsx}
           </ProductTourContainer>
           <div />
-        </>
+        </div>
       }
     >
       {children}

js_modules/dagster-ui/packages/ui-core/src/assets/AssetPageHeader.oss.tsx

@@ -72,10 +72,7 @@ export const AssetPageHeader = ({
   return (
     <PageHeader
       title={
-        <Box
-          flex={{alignItems: 'center', gap: 4}}
-          style={{maxWidth: '600px', overflow: 'hidden', marginBottom: 4}}
-        >
+        <Box flex={{alignItems: 'center', gap: 4}} style={{maxWidth: '600px', marginBottom: 4}}>
           <Title>
             <BreadcrumbsWithSlashes
               items={breadcrumbs}