Tour window has wrong position on dual monitor setup

[ohyou]

Please answer these question so I can help you faster.

Is it a bug or a feature request?

• It's a minor bug.

Which version are you using?

• Linux

Which is the version/distribution of the OS?

Linux 3.16.0-4-amd64 Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux

Describe your issue

The Tour Window positions itself in the center of the "available screen area", which doesn't work properly with a dual monitor setup - it positions itself inbetween the two displays.

Screenshot: https://i.imgur.com/f463ama.png

Steps to replicate

1. Open the Manta for the first time

[hql287]

@ohyou Ahh, never thought of this! Thanks for reporting.

[hql287]

This might be helpful. Will work on this in the next release.