Trim trailing whitespace of milestone titles

Trim trailing whitespace on user input.

The specific case I've come across is Milestone Titles.

@all

Please don't mention all. Can you create a mr that does this?

Milestone changed to 8.3

Jared, please don't use @all it spams everyone in the gitlab-org group. Thanks!

Title changed from Trim trailing whitespace to Trim trailing whitespace of milestone titles

mentioned in merge request !1843 (closed)

mentioned in merge request !1898 (merged)

mentioned in commit b9df1a63

This was addressed by https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1898

Status changed to closed