Start fixing app height when list is too large.

src/components/SearchableList.tsx

@@ -38,7 +38,7 @@ const SearchableList: FC<ListProps<Item>> = ({ component, map }) => {
           onChange={onChange}
         />
       </form>
-      <ul className="flex-grow flex flex-col overflow-auto">{children}</ul>
+      <ul className="flex-1 flex flex-col min-h-0 overflow-auto">{children}</ul>
     </div>
   );
 };

src/components/SolsticeApp.tsx

@@ -19,7 +19,7 @@ const MainPane: FC = () => {
   const { path } = useRouteMatch();
 
   return (
-    <main className="flex-1">
+    <main className="flex-1 min-h-0">
       <Switch>
         <Route path={`${path}rooms`}>
           <RoomsPane />