Reports can be viewed via two methods. Non-editing users can
access them via their report listing page, and report editors
can switch between editing and preview mode while working on
their reports.
Clean up remaining string definitions.
Co-authored-by: Mikel Martín <mikel@moodle.com>
Implement UI elements for editing columns of a report, taking their
definitions from the selected datasource.
Co-authored-By: David Matamoros <davidmc@moodle.com>
Co-authored-By: Mikel Martín <mikel@moodle.com>