Google Chrome / Win10
Click on the MAIN tab, move mouse over a disk and the grey bar flashes. Click on something and it stops flashing.
Click on DASHBOARD tab:
Move over Docker containers and the grey background doesn't look correct around docker logos.
Hover over Shares or Users or CPUs or Array: every-other line gets a grey bar, not every line.
I can see this is useful for lists of items that span the whole page width, e.g. on the Shares (tab), Dockers (tab), VMS (tab), definitely not required on the dashboard tab.