Update Metadata modal description should be cleaned up

[Justin Pomeroy]

The description displayed on the Update Metadata modal could use some minor changes. The modal is displayed when performing the Update Metadata action on images or flavors.

The current text is:
"You can specify resource metadata by moving items from the left column to the right column. In the left columns there are metadata definitions from the Glance Metadata Catalog. Use the "Other" option to add metadata with the key of your choice."

Issues:
1) "In the left columns..." should be "In the left column..."
2) The "Other" option should actually be "Custom"

The metadata definitions cannot be displayed if using the glance v1 API. It's probably not necessary but might also be a good idea to add some wording here so there is no confusion if nothing is displayed. Maybe just an "(if supported)" at the end of the second sentence.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/247670

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/247670
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=babe9992d7ac84c997edcfa96da78353076f4dc1
Submitter: Jenkins
Branch: master

commit babe9992d7ac84c997edcfa96da78353076f4dc1
Author: Gábor Antal <email address hidden>
Date: Thu Nov 19 17:03:21 2015 +0100

    Fixed Update Metadata modal description's typos

    There were typos in the Update Metadata modal description.
    "In the left columns..." is clearly a typo, which should be
    "In the left column..." Also, in the bug report there is another
    issue: "Other" option should be "Custom".

    Change-Id: If4a82109aaa4f1ba18e1415af0ff197658abda2f
    Closes-Bug: #1517296

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/horizon 9.0.0.0b1 development milestone.