Timetable: add an Edit Timetable by Class tool to Manage Timetables

[SKuipers]

This is a very handy timetabling tool that exists in the Course Selection module. I've now added it to the core when editing a timetable in Timetable Admin > Manage Timetables.

Description Adds an "Edit Timetable by Class" option to the Edit Timetable page in Manage Timetables. Added it here, rather than as a separate action, because it is a logical location for tools related to editing a timetable, and it reduces the complexity of needing to select a timetable and school year first.

Motivation and Context Changing the timetable for a class currently requires hunting down the individual entries in each timetable day and period. This makes it easier to add/edit/remove timetabling for a single class. Thanks to Ray Clark for adding the smart-block-style interface.

How Has This Been Tested? Locally.

Screenshots

[rossdotparker]

This is brilliant, and it has tested out perfectly : )