Log Message:
krita: update to 4.1.0, take maintainership.

This release includes the following major new features:
    A new reference images tool that replaces the old reference images docker.
    You can now save and load sessions: the set of images and views on images \ 
you were working on
    You can create multi-monitor workspace layouts
    An improved workflow for working with animation frames
    An improved animation timeline display
    Krita can now handle larger animation by buffering rendered frames to disk
    The color picker now has a mixing option
    Improved vanishing point assistant — and assistants can be painted with \ 
custom colors
    Krita’s scripting module can now be built with Python 2
    The first part of Ivan Yossi’s Google Summer of Code work on improving the \ 
performance of brush masks through vectorization is included as well!

Full release notes:
https://krita.org/en/krita-4-1-release-notes/