Add dashicon support to help title attribute.

Adds a couple words to signify dashicon support within the title attribute of the help "?" in the admin area. There isn't any documentation for this except an update to the plugin that was titled "Dashicon Support." However, the lack of documentation made this difficult to understand its implementation.
Merge pull request #183 from Daronspence/patch-1

Add dashicon support to help title attribute.