LPS-34840 Remove remaining occurences of templateHeaderTitle param
LPS-34962 Define if DDM structrure selector is displayed in DDMDisplay
LPS-34964 Define the behaviour of backURL in DDMDisplay

The view templates dialog should not display a backURL for Application Display Templates nor for generic Web Content templates. For other portlets the backURL leads to the structure list. With this change it's no longer necessary to include the backURL parameter in the URL for view templates.
LPS-34964 Source formatting
LPS-34964 Source formatting