Avoid making duplicate group categories

[Son Nguyen]

Version: master (1.10), 1.9, 1.8
Platform: any
Browser: any

Logged in as site admin, I can create duplicated group categories, see the screenshot

[Aaron Wells (u-aaronw)]

Marking this as low priority, because it's just giving admins the power to shoot themselves in the foot.

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/10059

[Steven (stevens-q)]

Commit hash: ceb49805669b27277078ad4f0fce671d76c930de
Environment tested: Master
Browser tested: Chrome
Theme used: Raw

PRECONDITIONS:
------------------------
1) Allow group categories toggle = Yes (Site options > Group settings)

TEST STEPS:
------------------------
1) Log in as Site admin
2) Browse to Administration menu > Groups > Group categories
3) Add a category called Cat 1
4) Add a second category with the same name Cat 1
5) Verify that an error message is displayed as follows: "The value entered already exists" ✔
6) Verify that leaving the field blank also displays an error message as follows: "The required field "Name" is empty"✔

Catalyst QA Approved ✔

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/10059
Committed: https://git.mahara.org/mahara/mahara/commit/b42035975c73e71dd3bc72b2b509723f67320793
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit b42035975c73e71dd3bc72b2b509723f67320793
Author: Ivan Barreto <email address hidden>
Date: Thu May 30 10:09:04 2019 +1200

Bug #1353809: Avoid making duplicate group categories

This change stops one having duplicate group category entries.
We will do the comparison in a case insensitive way so we avoid
having: CatA, caTa, catA, cAta etc.

behatnotneeded

Change-Id: I2daafe898f78e78b0aa0b0bf2ffac29ea1b814e4

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/10240

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/10240
Committed: https://git.mahara.org/mahara/mahara/commit/4a5ce96d8421c7051a6b549d224b5baee3e386d3
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 4a5ce96d8421c7051a6b549d224b5baee3e386d3
Author: Robert Lyon <email address hidden>
Date: Mon Aug 5 08:22:23 2019 +1200

Bug #1353809: Show correct messages on error and success

To stop the error message still showing on success

Change-Id: Id8b618fbfd62d0610304a211ccfd777bb87e08c8
Signed-off-by: Robert Lyon <email address hidden>