Feature freeze of Ubuntu 18.04 LTS is on March 1st, so as a owner of a HiDPI display, I would like to have another release with this commit included: https://cgit.kde.org/muon.git/commit/?id=89ff18ae5f05b41594deae240950e3eb81db75fe
Version 5.8.0 has been released, see https://mail.kde.org/pipermail/kde-announce-apps/2018-March/005433.html and is being packaged for Ubuntu bionic.