Added Roles & Capabilities page to user settings

Thanks @fsiddi for helping with the explanatory text.

pillar/web/settings/routes.py

@@ -35,3 +35,10 @@ def profile():
             flash(message)
 
     return render_template('users/settings/profile.html', form=form, title='profile')
+
+
+@blueprint.route('/roles')
+@login_required
+def roles():
+    """Show roles and capabilties of the current user."""
+    return render_template('users/settings/roles.html', title='roles')

src/templates/users/settings/base.pug

@@ -17,6 +17,13 @@
 							i.pi-vcard
 							| Profile
 					| {% endblock settings_sidebar_menu %}
+					| {% block settings_sidebar_menu_bottom %}
+					a(class="{% if title == 'roles' %}active{% endif %}",
+						href="{{ url_for('settings.roles') }}")
+						li
+							i.pi-cog
+							| Roles & Capabilities
+					| {% endblock settings_sidebar_menu_bottom %}
 			| {% endblock %}
 
 		#settings-container

src/templates/users/settings/roles.pug

@@ -0,0 +1 @@
+| {% extends 'users/settings/roles_base.html' %}

src/templates/users/settings/roles_base.pug

@@ -0,0 +1,35 @@
+| {% extends 'users/settings/page.html' %}
+| {% block settings_page_title %}Roles & Capabilities{% endblock %}
+| {% block settings_page_content %}
+| {% block explanation %}
+p.
+	Here is some behind-the-scenes info! In order to define what you can do on this website, we rely
+	on a system of #[em roles] and #[em capabilities]. For example, every website user "can-read" a
+	post, but only editors "can-write" and "can-edit" it.
+
+p.
+	Your roles are determined by multiple factors, such as being part of an organisation, being
+	subscribed to a service, etc… Your capabilities are determined by the roles you have.
+
+p.
+	If the website does not work as expected (for example you received permission-related errors),
+	it is often useful to mention what your Roles and Capabilities are when asking for support.
+| {% endblock explanation %}
+
+dl.dl-horizontal
+	dt Your Roles
+	| {% for role in current_user.roles | sort %}
+	dd {{ role }}
+	| {% else %}
+	dd Your account has no roles assigned, which means you have a free account.
+	| {% endfor %}
+
+dl.dl-horizontal
+	dt Your Capabilities
+	| {% for cap in current_user.capabilities | sort %}
+	dd {{ cap }}
+	| {% else %}
+	dd Your account has no capabilities assigned.
+	| {% endfor %}
+
+| {% endblock %}