When clicking on a connection, the connection details/traffic graph/etc. are shown as content which needs to be scrolled. The popup should auto-adjust it's height to fit the connection details without having to scroll them.
I don't know if we want implement this feature in the future because I don't like the idea when applet expands it's size automatically. It's the same when some application changes size automatically. It is not standard behaviour and it looks odd.
At least default size can be increased so traffic plotter can fit.
Bulk transfer as requested in T17796