Remove minimum height on elements in Flexible Form

[jscheffl]

I noticed that the flexible trigger form always used minimum 80px as space per form row, even if content is less. This occupies a too much screen space for simple forms.
Root cause is that the labels are receiving a minimum height of 80px if no flex basis is defined as style. This PR fixes the layout bug.

Before:

After / with this PR (incl. review comment fixes):

FYI @shubhamraj-git

[shubhamraj-git]

Seems the upper margin and the lower margin of each elements are not same, a bit weird, can we have it in sync?

[jscheffl]

Seems the upper margin and the lower margin of each elements are not same, a bit weird, can we have it in sync?

Good catch. I just checked the overall height and the label... but there seems to be a bit of un-aligned margin onthe filed in the right column... will update...

[jscheffl]

Seems the upper margin and the lower margin of each elements are not same, a bit weird, can we have it in sync?

Good catch. I just checked the overall height and the label... but there seems to be a bit of un-aligned margin onthe filed in the right column... will update...

Okay, fixed the layout glitch. I first thought it is a margin problem and then needed to hunt-down the root a bit. The problem was a condition that the helper text was not conditionally be rendered but always also as an empty element. That space was causing an un-alignment.
Therefore I needed to adjust the param spec interface as the description is provided by API as null and due to eslint all was assumed to be undefined. But it is not the same. Needed some eslint-ignore to correctly use and itnerpret a null value from description as this is always passed with null even if empty.
Side effect is that the condition for markdown actually was broken, now the markdown is happyly and correctly displayed.