Comment 4 for bug 1752360

Reviewed: https://review.openstack.org/551236
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=e2139bd71764c18fccbb47447b758cbc3fe47f7b
Submitter: Zuul
Branch: stable/queens

commit e2139bd71764c18fccbb47447b758cbc3fe47f7b
Author: Beth Elwell <email address hidden>
Date: Wed Feb 28 15:52:06 2018 +0000

    Add same launch instance error handling as image to instance

    Previously, when launching an instance with an instance snapshot rather
    than with an image, the error handling was not as pleasant. I.e. the
    volume size was not automatically set to the minimum size and the error
    message would only appear after attempting to launch an instance. This
    is a small patch that addresses this and makes the user experience more
    friendly.

    Change-Id: Ib694f66c74e90ee2e15201673de953c08cf10122
    Closes-bug: #1752360
    (cherry picked from commit 3233de8f0d13ad9e0223da9f1cf895aa30a6177e)