A clear and concise description of what the feature is

In the system the textarea has a hard coded not configurable height of 10.5rem.
For editors is that very uncomfortable for longtext inputs with more than 3 lines of content.

The feature allows adjusting the height of textarea during editing additional to scrolling with a simple change of two properties.

Why should this feature be included?

For editors is a fixed height of 10.5rem that very uncomfortable for longtext inputs with more than 3 lines of content. The authors should be able to adjust the size during editing instead of scrolling in a 3 lines height area.

Please provide an example for how this would work

The proposed change is:

1. replace the height property in the textarea wrapper with a minHeight of the same value
2. give the textarea the resize attribute with the value vertical