refactor to more idiomatic jaspr code

Author: schultek

site/lib/_sass/components/_tooltip.scss

@@ -60,4 +60,4 @@
       visibility: visible;
     }
   }
-}
+}

site/lib/src/style_hash.dart

@@ -2,4 +2,4 @@
 // dart format off
 
 /// The generated hash of the `main.css` file.
-const generatedStylesHash = 'VAQsUT7crZAw';
+const generatedStylesHash = 'Nx/ufc4onkpD';