dojoTabular CSS causing Google Page Speed warnings

[Douglas Hays]

dojo/resources/dojo.css has 4 very inefficient rules, 2 inefficient rules, and 0 potentially inefficient uses of :hover out of 20 total rules.

Very inefficient rules (good to fix on any page):

• table.dojoTabular thead tr th Tag key with 3 descendant selectors and Class overly qualified with tag
• table.dojoTabular thead tr td Tag key with 3 descendant selectors and Class overly qualified with tag
• table.dojoTabular tbody tr td Tag key with 3 descendant selectors and Class overly qualified with tag
• table.dojoTabular tfoot tr td Tag key with 3 descendant selectors and Class overly qualified with tag

Inefficient rules (good to fix on interactive pages):

• table.dojoTabular thead Tag key with descendant selector and Class overly qualified with tag
• table.dojoTabular tfoot Tag key with descendant selector and Class overly qualified with tag

[Douglas Hays]

simplified CSS that passes Page Speed

[Douglas Hays]

(In [22270]) Fixes #11247. Simplify dojoTabular CSS.