title: Messages from .properties file do not display UTF-8 characters
body: <p>As the title says, I can only add that if I enter ą ę ó manually in html file, it's fine.</p>
  
  <p>ViewResolver:</p>
  
  <pre><code>&lt;bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver"&gt;
      &lt;property name="prefix" value="/WEB-INF/templates/" /&gt;
      &lt;property name="suffix" value=".html" /&gt;
      &lt;property name="templateMode" value="HTML5" /&gt;
      &lt;property name="cacheable" value="false"/&gt;
      &lt;property name="characterEncoding" value="UTF-8"/&gt;
  &lt;/bean&gt;
  
  &lt;bean id="templateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine"&gt;
      &lt;property name="templateResolver" ref="templateResolver" /&gt;
  &lt;/bean&gt;
  
  &lt;bean class="org.thymeleaf.spring3.view.ThymeleafViewResolver"&gt;
      &lt;property name="templateEngine" ref="templateEngine" /&gt;
      &lt;property name="characterEncoding" value="UTF-8"/&gt;
      &lt;property name="order" value="1"/&gt;
  &lt;/bean&gt;
  </code></pre>
  
  <p>pom.xml:</p>
  
  <pre><code>&lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
  </code></pre>
  
  <p>example of html input:</p>
  
  <pre><code>&lt;h2&gt;&lt;p th:text="#{homepage.greeting}"&gt;Welcome&lt;/p&gt;&lt;/h2&gt;
  </code></pre>
  
  <p>inside the  tag of the html file:</p>
  
  <pre><code>&lt;meta charset="UTF-8"/&gt;
  </code></pre>
  
  <p>In IntelliJ Idea I have set project encoding to UTF-8, default encoding for properties files to UTF-8
  <img src="https://i.stack.imgur.com/nKC1B.png" alt="enter image description here"></p>
  
  <p>And I honestly have no idea where is the problem. When I change locale to pl, this is the output:
  <img src="https://i.stack.imgur.com/DaqxV.png" alt="enter image description here"></p>
  
  <p>Sorry but I can't post images yet.
  Any help would be greatly appreciated.</p>
  
  <p>Tried this filter in web.xml, still no luck.</p>
  
  <pre><code>&lt;filter&gt;
      &lt;filter-name&gt;encodingFilter&lt;/filter-name&gt;
      &lt;filter-class&gt;org.springframework.web.filter.CharacterEncodingFilter&lt;/filter-class&gt;
      &lt;init-param&gt;
          &lt;param-name&gt;encoding&lt;/param-name&gt;
          &lt;param-value&gt;UTF-8&lt;/param-value&gt;
      &lt;/init-param&gt;
      &lt;init-param&gt;
          &lt;param-name&gt;forceEncoding&lt;/param-name&gt;
          &lt;param-value&gt;true&lt;/param-value&gt;
      &lt;/init-param&gt;
  &lt;/filter&gt;
  &lt;filter-mapping&gt;
      &lt;filter-name&gt;encodingFilter&lt;/filter-name&gt;
      &lt;url-pattern&gt;/*&lt;/url-pattern&gt;
  &lt;/filter-mapping&gt;
  </code></pre>