toaster: add project pages for machines, targets, layers

We add new pages for the all-machines and all-targets
project-related views.

We update the existing template structure to create
a base project view, similar to a base build view, that includes
a breadcrumb.

Updating existing all layers view to use the new structure.

We update methods in the models to provide corrent
information display.

[YOCTO #6592]
[YOCTO #6593]

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
toastergui: added pages for project details

We add new pages for the layer importing, layer details,
showing project builds and project configuration.

The pages are  in read-only mode, but they're needed as
to be able to verify the quality of data in the system.

Write capabilities will be added in a subsequent patch.

[YOCTO #6595]
[YOCTO #6590]
[YOCTO #6591]
[YOCTO #6588]
[YOCTO #6589]

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
knotty: ignore interrupted system calls

With the improved exception handling added in an earlier commit bitbake
now stops when recieving a SIGWINCH. This happens frequently when
disconnecting and reconnecting tmux sessions and bitbake didn't survive.
Restore old behaviour of ignoring interrupted system calls but keep
proper exception handling for other errors.

Signed-off-by: Dan McGregor <dan.mcgregor@usask.ca>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>