Issue Summary

Name of a transition is not case sensitive, result is an error message. For example renaming a transition from "Test Failed" to "Test failed" fails with the error message "A transition with that name already exists".

 Steps to Reproduce

1. Go to Project settings > Workflows
2. Click on Edit of one of the workflows
3. Click on a transition and click on Edit
4. Change the name of the transition so that only a small cap is changed to capital letter and click on Save

Expected Results

Either the modification should be successful or the error message should be more specific or the fact that the name is not case sensitive should be mentioned in documentation.

Actual Results

An error message saying "A transition with that name already exists"

Notes

None

Workaround

1. Change the name in 2 steps:
2. Add something to the new name: Test Failed > Test failedx
3. Remove that something: Test failedx > Test failed