Bug fix pack for SFC-UI

Added missing angular-xeditable library (was not included because 'dist' is in .gitignore)
Fixed REST PUT requests
Fixed SFC/SFP table reload
Fixed SFC symmetric property
Fixed automatic addition of required SFF into SN

Signed-off-by: Andrej Kincel <akincel@cisco.com>, Martin Lauko <malauko@cisco.com>