Saving results

[retifrav]

Implement saving results (sent/received/lost, latency, etc). There is a button already, but it doesn't do anything at the moment.
Results could be saved in JSON format to standard system data folder (where telemetry dump goes to too) or wherever.
Saved results can perhaps be also loaded for previewing later.

[retifrav]

Saving to files might add a complexity of handling filesystem write access, which might be especially troublesome on Mac OS (the the application is sandboxed/translocated/etc) and probably Flatpak (permissions/entitlements and whatnot).

For now it would be already good to just copy the report text to clipboard.

[retifrav]

And actually, let's not implement saving to disk at all. Copying to clipboard is absolutely enough: user can then save the copied text to whatever file he wants.

What could be done though is an ability to copy the report/results in a format that could be further processed, such as JSON. So there should be an additional button or a button with a dropdrown menu with the following options:

• copy as plain text;
• copy as JSON.