style(Gradebook History): remove italics within results message

Fixes: UIDEV-200

test plan:
- choose a course and select "grades" from the sub-nav
- from the cog dropdown choose "gradebook history"
- note: i could not get this running locally but feel confident
  in the change that was made... if you run locally the message
  that displays under the results should no longer be italic

Change-Id: Icb7ef03e509b2ca3fc47dcbeca05d45cc41bbd53
Reviewed-on: https://gerrit.instructure.com/161038
Tested-by: Jenkins
Reviewed-by: Stephen Jensen <sejensen@instructure.com>
QA-Review: Dan Sasaki <dsasaki@instructure.com>
Product-Review: Kyle Follett <kfollett@instructure.com>

app/jsx/gradebook-history/SearchResults.js

@@ -153,11 +153,11 @@ class SearchResultsComponent extends Component {
     }
 
     if (this.noResultsFound()) {
-      return (<Text fontStyle="italic">{I18n.t('No results found.')}</Text>);
+      return (<Text>{I18n.t('No results found.')}</Text>);
     }
 
     if (!this.props.requestingResults && !this.props.nextPage && this.hasHistory()) {
-      return (<Text fontStyle="italic">{I18n.t('No more results to load.')}</Text>);
+      return (<Text>{I18n.t('No more results to load.')}</Text>);
     }
 
     return null;