Added new UI, button styles to the "Create Dataverse" link on AccountOptionsPage, so it is uniform with other create links across the site. Also added logic from the HomePage to the ManageStudiesFragment, so that the "Create Study + Upload Data" button appears on the Studies tab for the AccountOptionsPage. Also fixed a minor typo on the HomePage where an extra space was between the words and commas on the Studies/Files/Downloads counts. [ref 2880]