Remove incorrect error message after reviewing a change

If the state has changed to one of CI states (STAGING, STAGED or INTEGRATING)
during review, error message is shown to the user. This incorrectly happened also
when commenting a change already in CI state. Now the error message is shown only
when review was initiated from non CI state but the state has changed to one of
CI states meanwhile, before saving review.

Task-number: QTQAINFRA-858
Change-Id: I3be7b56c6e3d80f9b4c3f8a0a7a97a7757da4ac3
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Ismo Haataja <ismo.haataja@digia.com>
Drop review scores if a new patch set pushed during review

While reviewing a change, a new patch set can be pushed. If this happens,
review scores are dropped, just comments are saved. Information message
is shown to the user.

Task-number: QTQAINFRA-874
Change-Id: I1b2443e88bfaacb4f0f2d373a6629b9c2c2c04fb
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Ismo Haataja <ismo.haataja@digia.com>
Show info message in one page review

Review scores are dropped if a new patch set is pushed or the state
has changed to one of CI states (STAGING, STAGED or INTEGRATING) while
reviewing. The user is informed about this with a message. Earlier this
worked only from Publish Comments (review) page and one page review was
lacking this info message, added now.

Task-number: QTQAINFRA-888
Change-Id: Iad461a443fe80c622c6875cf7e1c8817cc360a26
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Ismo Haataja <ismo.haataja@digia.com>