Fix bug whereby the side-frame show/maximize/close controls wouldn't show if the sidebar was hidden and the page was refreshed.
Merge pull request #2466 from igloox/fix_hidden_sidebar

Fix bug whereby the side-frame show/maximize/close controls wouldn't sho...
onClose and redirectOnClose are mutually exclusive
Merge pull request #2469 from yakky/feature/fix_reload_close

onClose and redirectOnClose are mutually exclusive
Edited extending_cms/extending_page_title.rst
Merge pull request #2470 from timgraham/extending_page_title

Edited extending_cms/extending_page_title.rst
Add ability to specify xframe_options for each page
Refactor XFrameOptionsView into 'details' view
Fix indentation issues
Add migration for Page.xframe_options