Fixed table container header

[bengtmagnus]

Summary
Make table container headers "sticky" so they don't scroll out of view. And make the toggle field button a dropdown-like button.

Current Behavior
When a table is wider than the container there is a overflow scroll. If scrolled the filter field is also scrolled out of view.

Desired Behavior
Stay in place. Don't be able to scroll the entire container but just the table.

Steps to Reproduce (if reporting an issue)
Check a table that is wider than the container.

Proposed Solution (for improvements)
Wrap table in a separate div and overflow: auto. Perhaps also adjust the padding so it is more clear that there are more content.

Screenshots/Mockups