use regular WTForms DateField for requests dates

templates/requests/screen-1.html

@@ -3,6 +3,7 @@
 {% from "components/alert.html" import Alert %}
 {% from "components/text_input.html" import TextInput %}
 {% from "components/options_input.html" import OptionsInput %}
+{% from "components/date_input.html" import DateInput %}
 
 {% block subtitle %}
 <h2>Details of Use</h2>
@@ -76,7 +77,7 @@
     </transition>
 
     {{ TextInput(f.dollar_value, validation='dollars', placeholder='$0') }}
-    {{ TextInput(f.start_date, placeholder='MM / DD / YYYY', validation='date') }}
+    {{ DateInput(f.start_date, placeholder='MM / DD / YYYY', validation='date') }}
 
   </div>
 </details-of-use>