fix(autocomplete): dropdown shrink restore (#9734)

The virtualRepeatContainer for the autocomplete dropdown determines the original dropdown size from the height of the container.

Commit b114302 removed the fixed height of the dropdown selector, since we now have dynamic dropdown heights.

This does cause an issue for the virtualRepeatContainer, where it can't determine the `originalSize` of the dropdown.

Setting it to 100 percent, does properly expand the dropdown to the `max-height` of the JavaScript.

Fixes #9726.

Author: devversion

src/components/autocomplete/autocomplete.scss

@@ -184,6 +184,10 @@ md-autocomplete {
   position: absolute;
   box-shadow: 0 2px 5px rgba(black, 0.25);
   z-index: $z-index-tooltip;
+
+  // Expand the virtualRepeatContainer as much as the max-height from the JavaScript allows.
+  // This is necessary for the virtualRepeatContainer to be able to grow back.
+  height: 100%;
 }
 
 .md-virtual-repeat-container.md-not-found {