v4.5.0: refresh missing after creating new user with webfrontend

[msrex]

When you create new users in the webfrontend, sometimes after pushing the create-button the page refresh is missing - this seems to be especially the case after you entered users with very long (40+ characters) usernames. Manual refresh always works.

reproduction:

1. create a user (preferably with a 40+ char long username)
2. create a second user (also with a long username)
   => no automatic refresh.
   after a manual refresh the users show up.

[bartv2]

Can you check if this pull request fixes this issue?

[karlitschek]

@bartv2 It´s difficult for non developers to test a pull request. I think we have to discuss the pull requests internally in the developer community and then send a link to the latest stable snapshot a day later to the users so that they can confirm. owncloud.org/releases/owncloud-daily-stable45.tar.bz2

[DeepDiver1975]

I can reproduce this with 4.5.0 and 4.5.1
Seems to be fixed with 4.5.2