Fix example CSS (#2475)

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### What

- Examples dropdown items no longer wrap
- "Rerun is not yet supported on mobile browsers" text is no longer
squashed

### Checklist
* [ ] I have read and agree to [Contributor
Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md)
* [ ] I've included a screenshot or gif (if applicable)

<!-- This line will get updated when the PR build summary job finishes.
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PR Build Summary: https://build.rerun.io/pr/2475

<!-- pr-link-docs:start -->
Docs preview: https://rerun.io/preview/643efcb/docs
Examples preview: https://rerun.io/preview/643efcb/examples
<!-- pr-link-docs:end -->

scripts/demo_assets/static/index.css

@@ -73,7 +73,6 @@ p {
   color: #cad8de;
   letter-spacing: -0.15px;
   font-weight: 500;
-  line-height: 14px;
 }
 
 /* Rerun styling for strong text. Matches `TextStyle::Heading`. */
@@ -255,8 +254,6 @@ img.icon {
   padding: 6px;
 
   user-select: none;
-
-  width: 92px;
 }
 
 .dropdown-body.visible {
@@ -270,6 +267,8 @@ img.icon {
   font-size: 13px;
   display: flex;
   justify-content: space-between;
+  white-space: nowrap;
+  overflow: hidden;
 }
 
 .dropdown-entry:hover {

web_viewer/index.html

@@ -84,7 +84,6 @@
             letter-spacing: -0.15px;
             font-family: 'Inter', sans-serif;
             font-weight: 500;
-            line-height: 14px;
         }
 
         /* Rerun styling for strong text. Matches `TextStyle::Heading`. */

web_viewer/index_bundled.html

@@ -84,7 +84,6 @@
             letter-spacing: -0.15px;
             font-family: 'Inter', sans-serif;
             font-weight: 500;
-            line-height: 14px;
         }
 
         /* Rerun styling for strong text. Matches `TextStyle::Heading`. */