In `move_focus()`, when given an output, set the focus to the workspace of that
output instead of the output itself.
This fixes a bug that did not allow users to switch between outputs introduced
in afc6ad6.
It also fixes other issues before that commit when a workspace with children
was selected and the user tried to switch focus in the direction of another
output.
In the `focus parent` command, do not set focus above the workspace level.
These containers are not meant to be focused.
This prevents a crash on repeated `focus parent` commands.
Panels were explicitly rendered by calling wlc_surface_render in
handle_output_pre_render. Calling wlc_surface_render does not set the
surface's geometry (like wlc_view_set_geometry does). Sway did not call
wlc_view_set_geometry for panels, so wlc defaulted their geometry to be at
the origin. This is not correct for bars unless their location is top.
Furthermore, for a surface to receive pointer events, its mask has to be
set to visible. This causes wlc to render these surfaces, causing panels
and backgrounds to be rendered twice.
This commit makes panels and surfaces visible, sets the correct geometries
and removes the code that explicitly rendered them.
Tabbed/stacked containers are now created only if a view is present on
the workspace. If a view is created on previously empty tabbed/stacked
workspace, it gets wrapped in a container.
Prior to this commit all windows (e.g. shell surfaces) were handled the same
way in handle_view_created. Since backgrounds and panels have to be treated
differently, they could not be shell surfaces. This changes checks whether
a client is a background or a panel in handle_view_created and exists to
let them be dealt with elsewhere.
This fixes a segfault, when trying to get parent of the workspace/root container/(?), as it is not assuered that the view's parent node is not null in the loop
