editor: don't autofocus by default

Autofocus prompts the browser to scroll to the editor when the page
loads, which makes little to no sense on topic pages where the important
information is at the top.

app/templates/forum/edit_comment.html

@@ -31,7 +31,7 @@
 				{% endfor %}
 			{% endif %}
 
-			{{ widget_editor.text_editor(form.message, label=False) }}
+			{{ widget_editor.text_editor(form.message, label=False, autofocus=True) }}
 
 			<div>{{ form.submit(class_='bg-ok') }}</div>
 		</form>

app/templates/widgets/editor.html

@@ -1,11 +1,11 @@
-{% macro text_editor(field, label=True) %}
+{% macro text_editor(field, label=True, autofocus=false) %}
 	{{ field.label if label }}
 	{{ field() }}
 	<script>
 	window.addEventListener("load", function(){
 		var simplemde = new SimpleMDE({
 			element: document.getElementById("{{field.name}}"),
-			autofocus: true,
+			autofocus: {{ "true" if autofocus else "false" }},
 			autosave: {
 				enabled: true,
 				uniqueId: "{{ request.path }}+{{ field.name }}",