NumberInput - fix height issue

[larserbach]

I found two issues:

• The height of the number input does not match exactly the height of the designed component. We need to investigate where the difference comes from and how to align the coded comps to design
• The height changes, if the (stepper)-mode changes. mode 1 and 2 have the same height, mode 3 is different but shouldn't

[thrbnhrtmnn]

We had a look at todays review & merge session, here are the findings:

• Height in MD is correct
• Icon Button size is now wrong, which seems to be an issue with the container, the icons are correct.
• Height in SM & LG mode3 is still 1px higher than it should

[thrbnhrtmnn]

We had a look at todays review & merge session, here are the findings:

• Height is correct in all modes
• Mode 1 Stepper button should be square (ie. 48 px wide and 48 px high for the LG variant: Action.StepperCombo.LG.Vertical.Width")

[thrbnhrtmnn]

After todays review and merge session no more open points where found, the issue can be closed as done, once it is merged.