Add enhancement templates for issues

Hello,

we miss an enhancement template for issues based on the merge.md template

Cheers

created branch 5709-add-enhancement-templates-for-issues

By bmortier on 2017-10-05T17:00:42 (imported from GitLab)

mentioned in merge request !31

By bmortier on 2017-10-05T17:00:44 (imported from GitLab)

closed via commit de3b9570

By bmortier on 2017-10-05T17:27:55 (imported from GitLab)

closed via merge request !31

By bmortier on 2017-10-05T17:27:55 (imported from GitLab)

removed milestone

By bmortier on 2017-12-08T17:58:52 (imported from GitLab)