Most of the UI is covered by themes. The icon theme changes
automatically to light or dark based on the window color. Further
improvements will be based on the feedback from the users.
Change-Id: Ia63ee608fe7870bc7cc86abb892f5fd5d6f1d8ab
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168829
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Reviewed-by: Sahil Gautam <sahil.gautam.extern@allotropia.de>
Tested-by: Jenkins
