shell, controls: No hysteresis for independent bar rows

Reviewed-by: Stef Walter <stefw@redhat.com>
daemon: Add MountMonitor

Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Layout for including mount points on storage page

Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Adapt storage objects for new layout

Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Fill mount table on storage page

Fixes #67
Closes #1274
Reviewed-by: Stef Walter <stefw@redhat.com>