title: Select option does not work in Rails using MaterializeCSS
body: <p>I have a select option in my form_for in rails. It was working before I installed materialize but after installing it, it doesnt work anymore. Please see my code below:</p>
  
  <p>Game model</p>
  
  <pre><code>class Game &lt; ActiveRecord::Base
  
      GENRES = ['Action', 'Adventure', 'RPG', 'Simulation', 'Strategy', 'Sports', 'Others']
      PLATFORMS = ['3DS', 'WII U', 'NX', 'PC', 'Playstation', 'XBOX', 'PS Vita', 'Mobile', 'Others']
  
  end
  </code></pre>
  
  <p>new.html.erb</p>
  
  <pre><code>&lt;h1&gt; Add Game &lt;/h1&gt;
  
  &lt;%= form_for :game, url: games_path do |f| %&gt;
      Title: &lt;%= f.text_field :title %&gt; &lt;br /&gt;
      Genre: &lt;%= f.collection_select :genre, Game::GENRES, :to_s, :to_s, :include_blank =&gt; true %&gt; &lt;br /&gt;
      Platform: &lt;%= f.collection_select :platform, Game::PLATFORMS, :to_s, :to_s, :include_blank =&gt; true %&gt; &lt;br /&gt;
      Release Date: &lt;%= f.date_field :release_date %&gt; &lt;br /&gt;
      Progress: &lt;%= f.number_field :progress %&gt; &lt;br /&gt;
      Rating: &lt;%= f.number_field :rating %&gt; &lt;br /&gt;
  
      &lt;%= f.submit 'Add Game', class: 'add_game_button' %&gt;
  &lt;%end%&gt;
  </code></pre>