Changes in view.jsp:

- Migration to Liferay 6.2 
	--> Fixing bug that already existed but had no consequences in 6.1
	--> we were using a servlet parameter instead of a portlet parameter,
for explanations see:
		https://www.liferay.com/de/community/forums/-/message_boards/message/31624516
	--> solved by namespacing parameters
	
- changed alignment of buttons for community members
--> just a suggestion
--> if accepted, some CSS modifications are required;