Replace image and icon in the SQL Master Detail example application,
as well as the screenshot of the application on the landing page.
Task-number: QTBUG-60633
Change-Id: Ic739908b569ea7f974b9dac48f673e14f6557550
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Change-Id: I846439a9cf7ad965ed27a00f98dbc4ff97abe73b
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Martin Smith <martin.smith@digia.com>