Fix typo in bundle.php
Merge pull request #2206 from DavidOliver/bundle-typo

Fix typo in bundle.php
Add missing quotes for Cache delete calls. Fixes #2202
Simplify the navigation item access for AdminstrationPage
Simplify parent/child navigation item creation
Release 2.5.1
Further optimisations to the Navigation building
Simplify logic in build page around checking for core/extension updates
Introduce Widget::Checkbox to automatically handle checkbox markup creation
Don't enforce the 'column' class for all Checkbox label's by default
Update to use Widget::Checkbox in the DSE/SE
Ensure anything modified in AddSectionElements delegate still works
Preserve CDATA nodes when converting XML string into XMLElement

CDATA was getting identified as DOMText and therefore sanitised when it should be preserved as a CDATA section.
Fix indentation
Merge pull request #2208 from g-wilson/integration

Preserve CDATA nodes when converting XML string into XMLElement