bug#35589: Scribus and GIMP: Clipped, non-resizable windows and pixelated icons

[sirgazil via Bug reports for GNU Guix]

After a Guix System reconfigure and upgrading packages, Scribus 1.5.5 and 
Pencil2D 0.6.4 work alright now (these are Qt-based applications). However, the 
problem persists in the GIMP 2.10.14.

$ LANG=C guix describe
Generation 7    Jan 08 2020 13:53:10    (current)
  guix f98c050
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: f98c050c2017be06cff54abf965a8234f6998f76


I don't know what fixed the issue for Qt-based applications.

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