* josevalim/supervisor-get-callback-module/PR-1000/OTP-13619:
  Return callback module in supervisor format_status

The previous implementation of supervisor:get_callback_module/1
used sys:get_status/1 to get the supervisor inner state and
retrieve the callback module. Such implementation forbids any
other supervisor implementation that has an internal state
different than the #state{} record in supervisor.erl.

This patch allows supervisors to return the callback module
as part of the sys:get_status/1 data, no longer coupling the
callback module implementation with the inner #state{} record.

Notice we have kept the clause matching the previous
sys:get_status/1 reply for backwards compatibility purposes.

This reverts commit e020f75c10410a6943cd055bfa072a2641eab7da.

* siri/observer/improve-trace/OTP-13481:
  [observer] Update user guide
  [observer] Automatically add active node
  [observer] Allow more trace flags on procs/ports from GUI
  [runtime_tools] Don't trace the trace client port
  [runtime_tools] Allow setting trace flag 'exiting' with dbg
  [observer] Add more default match specs for messages
  [observer] Add test of new Ports tab
  [observer] Improve appearance in Trace tab
  [observer] Allow multiple select in Ports tab
  [observer] Make right click menu act on the "expected pid"
  [observer] In Trace tab, show procs/ports for selected node only
  [observer] Add right click menu in Table tab
  [observer] Add menu option to set default MS for send/receive
  [observer] Add tracing of ports
  [ttb] Allow setting trace flags on ports
  [observer] Set correct parent in Label dialog
  [observer] Add Ports tab in GUI
  [observer] Add functionality in GUI for trace pattern on messages
  [ttb] Set trace patterns on messages

Conflicts:
	lib/observer/src/observer_wx.erl

Document the new Ports tab and tracing of ports.

When setting trace flags on 'new_processes' or 'new_ports', the
currently active node is now automatically added if no other node is
traced.