Fix navbar layout issue in IE8
Update standard_layout.html.twig
Fix issue with JMSDiExtraBundle
Merge pull request #1213 from ralf57/master

Fix navbar layout issue in IE8
Fix toggle regression
Added isXmlHttp check
Merge pull request #1221 from WesleyVanOpdorp/XmlHttpDeleteAction

Added isXmlHttp check
made the logger optional in AdminExtractor
Update advance.rst

Fixed error in documentation.
Looks like admin->routerBuilder was renamed to routeBuilder, but documentation doesnt reflect it.
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Added details for currency type

I've been looking for a few minutes what to provide as option and figured out it's an ISO code, i think it'll help many users to add this in doc.
added addConstraint() to ErrorElement closes #1200
updated Resources/doc/reference/conditional_validation.rst
Update Admin toString method

As the getSubject method may return a boolean, the toString method can throw an exception.
Add missing unit test