SFC-UI - SFP support for context metadata

+ Context metadata can be attached to existing SFP
+ Bugfix for ACL create/edit dialog
+ Improvements in SFC create dialog

Change-Id: Ibb7155b8f0395b3908f5d4e70cee6993894b9b77
Signed-off-by: Andrej Kincel <akincel@cisco.com>