display information to the user when ports are being uploaded/downloaded

[GitHK]

Describe the user role

As an oSPARC user I'd like to have some more information when data in downloaded and uploaded in the background.

Describe the goal

input ports, for each individual port I want notifications for:

• port download started
• port download finished (with error or successfully)

output ports,for each individual port I want notifications for:

• port upload started
• port upload was aborted
• port upload finished (with error or successfully)

Describe the benefit

Enhance clarity and allow users to better understand what's happening to their data without having to look through the logs (which are not always available to all of them)

Tasks

Beta Give feedback

1. backend provides port notifications #1721
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2. frontend displays port notifications #1737
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