Add a sticky pin-row

[skullbearer]

Problem: when trying different production chains on a huge sheet, I want to keep track of the flow for certain items without scrolling up to the summary every time. For instance, in some cases I want to:

• keep the coal consumption within a certain number of belts per second,
• track how much of coal I consume throughout the sheet,
• track overproduction.

Solution: Add a sticky row with pinned item(s) use rate. That way, I can track the target value without scrolling up after every change.

[veger]

Similar to #6? Except you want to be able to select which items should be sticky, instead of all?

[shpaass]

The use case for this particuar request is huge sheets. If we pin all Summary or Extra ingredients, it can take up most of the screen space.

[veger]

So #6 might be obsolete if this one will do the same but with an (additional) choice of items, if the default is all items? 🤔

[shpaass]

The default is no items in the sticky.