Check against SSTOP status to decide if the process was stopped

Sleeping doesnt have the same semantics as on linux..
Fixes Stop/Continue actions on a process
Reorder the signals in the process context menu (#11395)

Stop/Cont, then Terminate, then Kill.
Fix window settings (size, pane height, sort column/direction) not properly saved when exiting the window (bug #10670)

Move the code setting the properties on window->settings to the delete-event handler,
at that stage we're sure the window still exists, and that the property setting
will actually trigger a config file write.