- Add Module\Admin\Features class
- Add route for admin/features
- Add features admin aside menu entry
- Move templates/admin/settings_features.tpl to templates/admin/features.tpl
- Remove admin_page_features and admin_page_features_post from mod/admin.php
* Seperate blocks in /admin/features.
Its hard to distinguish between blocks of settings in the features page. Its
useful to clearly mark the blocks belonging together.
* Also try to separate items for other themes.
* Make sure separate settings boxes work in all themes.
