Minor table style tweaks

[jwildfire]

Use (some of) the following from web-codebook:

        .web-codebook  .listing-container table {
            width: 100%;
            border-collapse: collapse;
        }

        .web-codebook  .listing-container thead tr {
            border-bottom: 2px solid black;
        }

        .web-codebook  .listing-container tbody tr {
            border-bottom: 1px dotted #ccc;
        }

        .web-codebook .listing-container td, .web-codebook .listing-container th {
            text-align: left;
            padding: 2px 5px;
        }

[jwildfire]

Went with less padding and borders above and below the tbody

[jwildfire]

Test Notes: Confirm that:

• a 2px thick black line is drawn beneath the thead (was 1px and gray)
• a 1px black line is drawn below the last row of the table (no line was drawn previously)
• Padding for each cell is 2px above and below the text and 5px on each side

[mhickle]

Pass