Feature request: Discussions - Option to export Statistics & Grading table as a spreadsheet

Description

We've received a couple requests from instructors with large classes for an option to export the Statistics & Grading table in Discussions as a CSV spreadsheet, so they can import contents from one or more of its columns into Gradebook for "specifications grading".

Users can copy and paste the content from this table using basic browser functions, but since other tools that include tables provide export options, it would be nice to make one available in Discussions too.

The spreadsheet should include a column for User ID, so content from it can be imported into Gradebook.

Environment

None

Test Plan

Create a site with Discussions and several students.
If no default forum/topic exists, create a forum and topic in Discussions.
Log in as Student 1, start a conversation in the topic.
As Student 2, reply to the Student 1's post and also start a new conversation in the topic.
As Student 3, reply to both previous conversations and start a new conversation.
Log back in as Student 1, reply to at least one other student's conversation.
Wait a day or two, and as instructor, create another topic. Note: Steps to create topics and post on different dates are needed to check dates in the Stats & Grading by Topic spreadsheet.
As students, post and reply in the new topic AND the old topic.
Wait another day or two and as instructor, create another topic.
As students, post/reply in the various topics.
As instructor, go to Discussions > Statistics & Grading.
Next to Statistics & Grading by User, you should find a Download icon. Select this icon and save the spreadsheet to your computer.
Open the spreadsheet and you should find columns for User ID, Name, and a column for each table column in the Statistics & Grading page.
On the Statistics & Grading page, select Statistics & Grading by Topic.
Next to Statistics & Grading by Topic, you should find a Download icon. Select this icon and save the spreadsheet to your computer.
Open the spreadsheet on your computer. It should be include a column for each column on the Statistics & Grading by Topic page. Make sure the dates are correct per the Statistics & Grading by Topic page.