GUAC-1213: Parse date values leniently.

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

@@ -2,6 +2,7 @@
     <input type="date"
            ng-model="typedValue"
            ng-model-options="modelOptions"
+           guac-lenient-date
            placeholder="{{'FORM.FIELD_PLACEHOLDER_DATE' | translate}}"
            autocorrect="off"
            autocapitalize="off"/>