Use visualization name for CSV export filename

[dave-wheeler]

Kibana version: 7.7.0
Elasticsearch version: 7.7.0
Server OS version: Archlinux
Browser version: FF 76.0.1
Browser OS version: Archlinux
Original install method (e.g. download page, yum, from source, etc.): Download page/AUR package
Describe the bug: CSV export filename has regressed to always being table.csv.

Steps to reproduce:

1. Open a visualization
2. Click one of the export links (Raw or Formatted)
3. File is named table.csv.

Expected behavior:
Visualization name is used for filename.

Any additional context:
#3625

[elasticmachine]

Pinging @elastic/kibana-reporting-services (Team:Reporting Services)

[tsullivan]

Looks like this issue is about downloading the CSV from Inspector:

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[dave-wheeler]

FYI: This worked as expected before 7.7, so it's really a regression bug, and not an enhancement or feature request.

[dave-wheeler]

As I've mentioned earlier, this is a regression of a previously completed ticket, and not a feature request.
#3625

After having to change several scripts that use exported visualization data when #3625 was completed, I'm having to revert them with this regression (I've had to change them rename to table.csv to hard-coded-in-the-script visualization names). If this issue is ever addressed, I will have to change them a 3rd time. Is there an expected time frame for when that might be?

[dej611]

I've managed to reproduce the issue, but only when using a new Data Table visualization, and clicking the Export links below the table.

Using the Inspector download links the files are downloaded with as unsaved.csv filename.