Use a bit less margin at the top and add some margin at the bottom of
the search entry. This should ensure the search entry is closer to the
panel than to the workspaces and avoid associating the workspace
thumbnails with the search instead of the window picker.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1702>
In the future, we want to tightly control the state of the
layout throught gestures, which requires hooking everything
together with adjustments. This is the first step in this
direction.
Add a new custom layout manager for ControlsManager that
allocates the search entry, the view selector, and the Dash,
vertically.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>