shell: Improve password related UI strings

Fixes #1172
Closes #1277
Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Make onoffbox available as cockpit.OnOff

Reviewed-by: Stef Walter <stefw@redhat.com>
shell: Use OnOff control for RAID bitmaps

Fixes #1214
Closes #1283

Reviewed-by: Stef Walter <stefw@redhat.com>
shell, controls: No hysteresis for independent bar rows.
daemon: Add MountMonitor.
shell: Layout for including mount points on storage page.
shell: Adapt storage objects for new layout.
shell: Fill mount table on storage page.

Fixes #67