To hide all the channel windows by command copy these 2 aliases into your remote use /hidechans command and for double click i don't know how to do it that's the why i gave you the Fkeys, to restore the windows use /showchans command.

Code:
alias showchans { 
  var %i = 1
  while ($window(*,%i)) { 
    window -w1 $qt($v1)
    inc %i 
  } 
}
alias hidechans { 
  var %i = 1
  while ($window(*,%i)) { 
    window -w0 $qt($v1)
    inc %i 
  } 
}

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