[Feature request] Additional items for systems information

[ronivay]

Currently the systems information provides a fixed amount of items to be used.

I'd like to propose a feature that allows either an arbitrary amount (preferred) or at least a fixed amount (maybe a few?) of "custom" items that could be mapped to values from providers to be used in dashboards.

I know i can map any of the items to any value from providers if i wish (though the item name is off in that case), but in my use case i'd like to show the default items but also some additional ones which i cannot do currently.