GUAC-1213: Use HTML5 date/time input types.

guacamole/src/main/webapp/app/form/templates/dateField.html

@@ -1,3 +1,7 @@
 <div class="date-field">
-    <input type="text" ng-model="model" autocorrect="off" autocapitalize="off"/>
+    <input type="date"
+           ng-model="typedValue"
+           ng-model-options="modelOptions"
+           autocorrect="off"
+           autocapitalize="off"/>
 </div>

guacamole/src/main/webapp/app/form/templates/timeField.html

@@ -1,3 +1,7 @@
 <div class="time-field">
-    <input type="text" ng-model="model" autocorrect="off" autocapitalize="off"/>
+    <input type="time"
+           ng-model="typedValue"
+           ng-model-options="modelOptions"
+           autocorrect="off"
+           autocapitalize="off"/>
 </div>