Added transaction explorer dashboard generator.
Added high volume transaction dashboards.
Fixed description fields for dashboard.

Added notes sections.
Added digital take-up module generator.
Added digital-take-up for high volume services.
Added percentage format to digital-takeup
Fix issue caught by the schema validation.

Only add a related link if one is available in the response.
Fixed weird character issue
Trim whitespace
Changed dashboard-type as per @lennym request.
Updated properties on digital_takeup as per @annaps request.