Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
	app/controllers/oauth/authorizations_controller.rb

Just two changes being too close to one another.
Took both.

app/controllers/auth/sessions_controller.rb

@@ -11,6 +11,7 @@ class Auth::SessionsController < Devise::SessionsController
   prepend_before_action :set_pack
   before_action :set_instance_presenter, only: [:new]
   before_action :set_body_classes
+  after_action :clear_site_data, only: [:destroy]
 
   def new
     Devise.omniauth_configs.each do |provider, config|
@@ -28,8 +29,10 @@ class Auth::SessionsController < Devise::SessionsController
   end
 
   def destroy
+    tmp_stored_location = stored_location_for(:user)
     super
     flash.delete(:notice)
+    store_location_for(:user, tmp_stored_location) if continue_after?
   end
 
   protected
@@ -126,4 +129,16 @@ class Auth::SessionsController < Devise::SessionsController
     end
     paths
   end
+
+  def clear_site_data
+    return if continue_after?
+
+    # Should be '"*"' but that doen't work in Chrome (neither does '"executionContexts"')
+    # https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Clear-Site-Data
+    response.headers['Clear-Site-Data'] = '"cache", "cookies", "storage"'
+  end
+
+  def continue_after?
+    truthy_param?(:continue)
+  end
 end