Apply classic bugfix from f95c3bb0ddcc to minimal template, too.

(mostly to reduce the differences between both templates)

Author: ThomasAH

share/roundup/templates/minimal/html/page.html

@@ -39,8 +39,9 @@ <h2><span metal:define-slot="body_title">body title</span></h2>
        <input type="hidden" name="@sort" value="activity"/>
        <input type="hidden" name="@group" value="priority"/>
        <input id="search-text" name="@search_text" size="10"
-              tal:attributes="value request/search_text"/>
-       <input type="submit" id="submit" name="submit" value="Search" i18n:attributes="value" />
+              tal:attributes="value request/search_text | default" />
+       <input type="submit" id="submit" name="submit" value="Search"
+              i18n:attributes="value" />
      </form>
   </div>
  </td>