Add a new ClutterLayoutManager for layouting the workspaces of the
overview, WorkspaceLayout.
This layout manager integrates the existing LayoutStrategies used to
layout the window clones of the overview and supports freezing the
layout, animating between layout changes and adjusting the spacing for
the width and height of the window chrome. It also adds support for a
layout of the windows that looks the same as the actual workspace,
transitioning between that layout and the LayoutStrategy can be done by
setting the value of an StAdjustment, available using the
stateAdjustment getter function.
This will replace the current static-positioning based layouting of the
window clones in the next commit.
https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1305
21187a4cec