PLF-5225 No Left Navigation at pages of /platform/web-contributors group after upgrading from Platform 4.0.0

Fix description
* Declare portal layout for the default group template which is used to create group pages.
PLF-5239: [IE8] Cannot download document from REST service

Fix description
	- Use cache for application files
PLF-5213 : Remove IDE entry from ProductVersion node
PLF-4757 : [Welcome Screens][Account Setup]Allow to skip the account creation

Fix description:
* Add method to read accountsetup.skip from environment parameters and handle this action
* Add more conditions to skip Account Setup and Greetings screens.
PLF-5133 [Login Screen] Form submit when clicking at a certain place outside fields

Fix description:
* Only trigger the action when user clicks on the button.
PLF-4862 : Top bar menus don't show sub-menus on mouse over

Fix description
* Add mouse hover action in User Menu, Administration Menu and Edit Menu
PLF-5158 : NullPointerException when click Abort button after edit layout of portal

Fix description:
* Add <page-body> tag to "RightBody" container to prohibit its deletion.
PLF-4908 : Show duplicate documents node in Navigation Management

Fix description:
* Remove the redundant Document node from the portal navigation
Merge commit 'e9f35968df82abe2bfbafd50502fe7baa2709730' into HEAD