Remove context menu except for copy option
Remove context menu except for copy option

Previously we had the default context menu items
in the EknWebView. This meant that going forward
or back via the context menu would bypass our
history model. Instead we now disable the context
menu expcept for the copy button, which design
wants to keep for now.

[endlessm/eos-sdk#2551]

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib