Grid component not setting spacing in IE

[Saladinek]

Steps to reproduce: 1. Use Grid component, fill with child elements and set spacing property

expected result: Spacing will be set in IE aswell

Actual result: Spacing is not set in IE

Opening https://precise-ui.io/#/Components/Grid in IE shows errors, which come from the 'computeIeRows' function

[FlorianRappl]

The grid will never have the spacing on IE as it uses the native CSS grid, which in IE does not support spacing.

As far as the computeRows functions is concerned, this, of course, is an issue.