Improvements of People dialog. Patch from Phenom (slightly modified).

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7603 b45a01b8-16f6-495d-af2f-9b41ad6348cc
Updated todo strings

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7604 b45a01b8-16f6-495d-af2f-9b41ad6348cc