ChangeScreen2: Show state as 'Not Current' for old  patch sets

At the moment the change state for non current patch sets is shown as
"Review In Progress". It is better to show it as "Not Current" to
highlight that the user views a non current patch set, this makes it
e.g. easier to understand why certain operations (e.g. edit commit
message) are not available.

Bug: issue 2077
Change-Id: I6d0a5b99a89ef531317129a5a5e14b7faca438ee
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
3 files changed