submit: don't disable submit button by default

this doesn't create an issue because HTML form validation does work here

files/templates/submit.html

@@ -105,7 +105,7 @@
 								</div>
 								<div class="col text-right">
 										{% if error %}<span class="text-danger text-large mr-2">{{error | safe}}</span>{% endif %}
-										<button type="submit" class="btn btn-primary" id="create_button" type="submit" onclick="disable(this)" disabled>Post</button>
+										<button type="submit" class="btn btn-primary" id="create_button" type="submit" onclick="disable(this)">Post</button>
 								</div>
 						</div>
 				</div>