fix(storybook): Input field number adjustment

[bar-tay]

closes #915
closes #932
closes #933
closes #1117

[thrbnhrtmnn]

Hey @bar-tay , here are my findings:

#933

• The unit color is not correct in disabled and in error state

#932

• The widths are all correct now, but it seems like the height in the MD is wrong now for the vertical stepper variant

#915

• When a unit is shown or when stepperVaraint = Split, the readonly state now shows some outline or border around the user input container

[thrbnhrtmnn]

Thanks @bar-tay , everything has been solved :-)