Allow the list and library web parts to resize to show all items without using scroll bars in the web part
The web part includes a Size property with the option to Autosize. However the web part still uses a vertical scrollbar. This results in nested scroll bars - one for the web part and another for the page.
It would be better if the web part size adjusted to the full height of the content. The web page scroll bars can then be used to navigate the content.
The Small, Medium and Large Size options can be used if you want to restrict the web part height.
When the view is configured to group by a column (expanded), the web part height is adjusted to display all items without using a scroll bar on the web part. However the number of items is restricted and you need to click a "Show All" link to see remaining items. This causes the web part scroll bar to appear.