CHE-4516: Check command goal name uniqueness ignoring string case considerations on new goal creation #4656
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What does this PR do?
Since Commands Explorer displays all goals names in uppercase we need to check newly created goal name for uniqueness ignoring string case considerations in order to avoid situations like on this screenshot:
![image](https://cloud.githubusercontent.com/assets/1636395/24544851/89865f16-160d-11e7-8d72-9154e62bcbd4.png)
So this PR adds checking goal name uniqueness ignoring string case considerations on new goal creation.
Now user will be proposed to enter another goal's name:
![goal](https://cloud.githubusercontent.com/assets/1636395/24545626/87850cb4-1610-11e7-84fc-2b35148002ee.gif)
What issues does this PR fix or reference?
#4516
Changelog
Now all command goals names must be unique ignoring string case considerations.
Release Notes
N/A
Docs PR
N/A