JIRA should not display error if only white space is entered to issue creation form upon cancelling

Summary

JIRA should not display warning if only white space is entered to issue creation form upon canceling

Steps to Reproduce

1. Click on the create button to create an issue
2. Do not fill any field
3. Enter a single white space in the summary field
4. Hit Cancel

Expected Results

JIRA will simply close the issue creation screen, disregarding the white space

Actual Results

JIRA displays the following warning:

Notes

• Reproducible in JIRA 6.4.14, 7.3.2
• Not reproducible in JIRA 6.3.15