option to remove, or move reconnected notification

### Description

There's a terribly placed popup that notifies of a reconnection. And it stays on screen for some time blocking the interface.

I'd like an option to remove this as it's in a bad spot the blocks the buttons I need.

I'd rather see the UI greyed out with a screen centred text "reconnecting..." Then soon as the connection is available that's gone.

### Have you provided an initial effort estimate for this issue?

I am no FlowFuse team member