Tooltips: fix cue mode setting location

[asymmetric]

The manual also agrees with this change.

[JoergAtGithub]

Welcome at Mixxx!
As a first-time contributor we need you to sign the Mixxx Contributor Agreement and comment here when you have done so. It gives us permission to distribute your contribution under the GPL v2 or later license and the Apple Mac App Store. It is also helpful for us to have contact information for contributors in case we may need it in the future.

[asymmetric]

Done.

[ronso0]

Thank you, LGTM

[daschuer]

@asymmetric I would like to list your name as a contributor in the Mixxx about box. Should I use your real name or you GitHub name?

[asymmetric]

@daschuer you can use my real name — thanks for asking! :)