Create <div> css class for test endpoints

[rciampa]

Workflow:
Create the <div> container css class for test endpoints. The <div> should have a minimum height of 20px and span the entire width of the containing <div>.

Explanation:
Each test identified by a master test identification number found in the [Master_ID] field of the database contains several trace route endpoints. This is the <div> that holds the other symbols/shapes that comprise each visualized trace route.

Where:
./Styles/ui-shapes.css

Named:
div.endpoint