Various fixes in forum

Add new access type: guest - all visitors, player will be now for logged players only
Fixed default forum board access for guests

system/templates/forum.add_board.html.twig

@@ -22,7 +22,7 @@
 						<td>
 							<select name="access">
 								{% for id, group in groups %}
-									<option value="{{ group.getId() }}"{% if access == group.getId() %} selected{% endif %}>{{ group.getName() }}</option>
+									<option value="{{ group.id }}"{% if access == group.id %} selected{% endif %}>{{ group.name }}</option>
 								{% endfor %}
 							</select>
 						</td>

system/templates/forum.move_thread.html.twig

@@ -24,7 +24,7 @@
 							</select>
 							<input type="submit" value="Move Thread">
 						</form>
-						<form action="{{ section_link }}" method="post">
+						<form action="{{ section_link }}">
 							{{ csrf() }}
 							<input type="submit" value="Cancel">
 						</form>