[#52155] Duplicate scrollbars on project list page

[dominic-braeunlein]

OP WP: #52155

To stop duplicate scrollbars to appear the project list height needed to be adjusted.

The height calculation got moved out of the table component and into the project list index page. The project list is dynamically growing (flex-grow: 1) now and fills up the available space without being too high.

I am not sure if $toolbar-height--mobile: 100px is still in use. I could not see a difference in toolbar height.