Introduce max-h-65vh

I need this to refactor the featureinfobox and sub-classes.

Ideally we could add this class via tailwind.config.js but for some reason it does not work; the class does not appear in the index.css file.

As a workaround I added it differently, but still we should probably figure out why the config file does not work as expeced.

index.css

@@ -2,6 +2,15 @@
 @tailwind components;
 @tailwind utilities;
 
+@layer utilities {
+  @variants responsive {
+    .max-h-65vh {
+      max-height: 65vh;
+    }
+  }
+}
+
+
 :root {
     --subtle-detail-color: #e5f5ff;
     --subtle-detail-color-contrast: black;