Adds alt-n hotkey for new element.
Converted ElementsHelper documentation to yardoc syntax.
Fixes failing spec for Page.copy when using postgresql.
Fixes double hotkey event and fix new element hotkey.
Adds hotkey for refreshing the preview window (alt-r)
Adds hotkeys for unlocking page (alt-x) and edit properties (alt-e)
Yard documentation for the admin base helper.
Specs admin pages helper.
Do not memorize content descriptions.
Link to 2.6-stable branch in readme [ci skip]
Reset padding of tag icon in tags module. [ci skip]
Fixes error when passing a page_layout of a not existing page to render_navigation(:from_page)

Also adds some specs for the from_page option and the base_helper#page_or_find method.