display_tag() missing index error

[Robert Lyon]

After upgrading from 18.04 I get this error error message when I go to Create -> Files page

[WAR] c1 (lib/form/elements/tags.php:99) Undefined index: OPSO
Call stack (most recent first):

    log_message("Undefined index: OPSO", 8, true, true, "/home/robertl/code/mahara-devel/mahara/htdocs/lib/...", 99) at /home/robertl/code/mahara-devel/mahara/htdocs/lib/errors.php:520
    error(8, "Undefined index: OPSO", "/home/robertl/code/mahara-devel/mahara/htdocs/lib/...", 99, array(size 2)) at /home/robertl/code/mahara-devel/mahara/htdocs/lib/form/elements/tags.php:99
    display_tag("OPSO", array(size 0)) at /home/robertl/code/mahara-devel/mahara/htdocs/artefact/file/lib.php:723
    ArtefactTypeFileBase::get_my_files_data(0"1", null, null, null) at /home/robertl/code/mahara-devel/mahara/htdocs/lib/form/elements/filebrowser.php:163

To replicate:

1) Have a new 18.04 install
2) Upload a file to the Create -> Files page area
3) Edit it and add a tag
4) Upgrade the site to master
5) Go to the Create -> Files page - see error

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/10558

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/10558
Committed: https://git.mahara.org/mahara/mahara/commit/ddbf98b7e0fa049f5aef908757347ebebc27d3e6
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit ddbf98b7e0fa049f5aef908757347ebebc27d3e6
Author: Cecilia Vela Gurovic <email address hidden>
Date: Mon Nov 4 13:36:36 2019 +1300

Bug 1851165: filter tags by owner id

behatnotneeded

Change-Id: Ib973889a28b5a3319ffc2fbc6c240ba802d7a7ea

[Mahara Bot (dev-mahara)]

Patch for "19.10_STABLE" branch: https://reviews.mahara.org/10575

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/10575
Committed: https://git.mahara.org/mahara/mahara/commit/3c4b28333c87d4372984ddcc0192f06d5da58368
Submitter: Robert Lyon (<email address hidden>)
Branch: 19.10_STABLE

commit 3c4b28333c87d4372984ddcc0192f06d5da58368
Author: Cecilia Vela Gurovic <email address hidden>
Date: Mon Nov 4 13:36:36 2019 +1300

Bug 1851165: filter tags by owner id

behatnotneeded

Change-Id: Ib973889a28b5a3319ffc2fbc6c240ba802d7a7ea
(cherry picked from commit ddbf98b7e0fa049f5aef908757347ebebc27d3e6)

[Mahara Bot (dev-mahara)]

Patch for "19.04_STABLE" branch: https://reviews.mahara.org/10576

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/10576
Committed: https://git.mahara.org/mahara/mahara/commit/042c141bcbecde9a7e636dc5391f0f2e57af6446
Submitter: Robert Lyon (<email address hidden>)
Branch: 19.04_STABLE

commit 042c141bcbecde9a7e636dc5391f0f2e57af6446
Author: Cecilia Vela Gurovic <email address hidden>
Date: Mon Nov 4 13:36:36 2019 +1300

Bug 1851165: filter tags by owner id

behatnotneeded

Change-Id: Ib973889a28b5a3319ffc2fbc6c240ba802d7a7ea
(cherry picked from commit ddbf98b7e0fa049f5aef908757347ebebc27d3e6)
(cherry picked from commit 3c4b28333c87d4372984ddcc0192f06d5da58368)

[Mahara Bot (dev-mahara)]

Patch for "18.10_STABLE" branch: https://reviews.mahara.org/10577

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/10577
Committed: https://git.mahara.org/mahara/mahara/commit/1f5dd73cea2d07de0a0531f33f565fef8f10d9b3
Submitter: Robert Lyon (<email address hidden>)
Branch: 18.10_STABLE

commit 1f5dd73cea2d07de0a0531f33f565fef8f10d9b3
Author: Cecilia Vela Gurovic <email address hidden>
Date: Mon Nov 4 13:36:36 2019 +1300

Bug 1851165: filter tags by owner id

behatnotneeded

Change-Id: Ib973889a28b5a3319ffc2fbc6c240ba802d7a7ea
(cherry picked from commit ddbf98b7e0fa049f5aef908757347ebebc27d3e6)
(cherry picked from commit 3c4b28333c87d4372984ddcc0192f06d5da58368)