@upart is needed for rendering sidebar - fixes 7834
Merge pull request #79 from azul/bugfix/7834-preserve-star

@upart is needed for rendering sidebar - fixes 7834
fix changing page access in details popup - fixes 7833

including integration test
test: move star actions and assertions into helpers
Merge pull request #78 from azul/bugfix/7833-change-page-access

fix changing page access in details popup - fixes 7833
include some tweaks from a former fix for 7844

* refactor pages/trash_controller some
* integration test destroying pages

Conflicts:
	test/integration/page_sidebar_test.rb