Icon's non-linear font-scaling doesn't fit the text sizing

[hrach]

Newly, there is the non-linear scaling. Orbit's icon usage is relying on the icon's box height to be the same height as the line height of the accompanying text. I.e. 15sp text with line-height 20sp fits nicely with 20sp tall icon.

The issue now appears when the non-linear scaling applies smaller enlargement on a bigger text. All this is calculated against a sp unit value.

Therefore, in the aforementioned example, this stops working:

• text 15sp with 1.5 font-scale is ~23sp
• text's 20sp line-height with 1.5 font-scale is ~26sp
• icon's 20sp height with 1.5 font-scale is ~26sp

But, this produces a different ratio between the text size and the icon size, which should be/had been ~30sp before (non-linear scaling) and now it is "only" ~26sp.

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So there are these options:

1. Ask Orbit designers to define baseline definitions for icons - this would help in many other cases and we could stop relying on the line-height calculation. But this change is a long shot.
2. Let it be. Scaled designs are not meant to be pixel-perfect.
3. Rework the calculation to somehow match the logic -> resolve the actual scaling for 15sp. and then rescale the icon to ~30sp.

Originally posted by @hrach in #564 (comment)

[hrach]

Agreed with Orbit designers to let it be, at least for now.