Configuration cleanup

[olehj]

Aside from the SMART configuration that's gone #343 the "unraid/manual ISO date" selector is gone. In the future the dates will be gathered directly from Unraid's own configuration (it has mostly been like this already). Consider to make that file editable directly via the plugin too for more simplicity than the Unraid way of doing it..

Styles for serial numbers will now be a part of the dashboard customization #342

[olehj]

This will be a part of #346 as well