When selecting a drop down menu for the assign action window there is no contrast between the pop up window and the dropdown. Suggest adding contrast to view the menu better.

The CSS for .action-form-dropdown has box-shadow: rgba(54,54,54,0.05) 0px 8px 8px 0px;

I'm guessing there might have been a typo because if you just remove a 0 in the opacity, it makes it readable. Like this: box-shadow: rgba(54,54,54,0.5) 0px 8px 8px 0px.