debian/patches/notebookpage

Only fill with white windows with no alpha channel, allowing ones that
actually support transparency to stay transparent.

Paint the window background white and hope the user has an overally
light UI theme, so the default window background is roughly the same
color as the theme's.

This fixes white flashes visible with Compiz 0.9 and inverted colors.
For windows with no alpha channel the current state of not filling the
background at all will result with effectively a "capture" or the
display under the window.  Thus, the window content will be the
effective displayed content after inversion, and thus an inversion of
that window's content will result in a "double inversion", leading to
maximum contrast and thus a "white flash" when using a light theme
(which becomes dark after inversion).

Filling the window with a plain color close to the theme's one will
prevent this effect.

filechooser keyboard actions and shortcut

Closes https://salsa.debian.org/hypra-team/hypra-desktop-environnement/issues/232

Patch cherry-picked from https://gitlab.gnome.org/GNOME/gtk/issues/957

See merge request !4

Patch cherry-picked from https://gitlab.gnome.org/GNOME/gtk/issues/957

HighContrast: improve contrast of inactive notebook tabs

See merge request !1

Add debian/patches/tab-contrast, refresh from Hypra stretch.