Comment 5 for bug 1257319

Double clicking on the title maximizes it much better but leaves a small margin between the window borders and the screen borders (annoying).
The same happens if maximized with a shortcut...
Dragging the window when maximized by shortcut/doubleclick actually drags the window but leaves the maximized flag on.
Dragging the terminator window to the top of the screen and then dragging again unchecks the maximized flag.

The drag to top xwininfo and xprop:

xwininfo
  Absolute upper-left X: 2169
  Absolute upper-left Y: 20
  Relative upper-left X: 0
  Relative upper-left Y: 0
  Width: 1914
  Height: 1053
  Depth: 32
  Visual: 0xec
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0xc0004b (not installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners: +2169+20 --243+20 --243-7 +2169-7
  -geometry 239x69+2169+0

xprop
_NET_WM_ICON_GEOMETRY(CARDINAL) = 0, 226, 42, 88
_NET_WM_ALLOWED_ACTIONS(ATOM) = _NET_WM_ACTION_MOVE, _NET_WM_ACTION_RESIZE, _NET_WM_ACTION_MINIMIZE, _NET_WM_ACTION_SHADE, _NET_WM_ACTION_MAXIMIZE_VERT, _NET_WM_ACTION_MAXIMIZE_HORZ, _NET_WM_ACTION_CHANGE_DESKTOP, _NET_WM_ACTION_CLOSE
_KDE_NET_WM_FRAME_STRUT(CARDINAL) = 2, 2, 23, 4
_NET_FRAME_EXTENTS(CARDINAL) = 2, 2, 23, 4
_NET_WM_DESKTOP(CARDINAL) = 0
WM_STATE(WM_STATE):
  window state: Normal
  icon window: 0x0
_NET_WM_STATE(ATOM) = _NET_WM_STATE_MAXIMIZED_VERT, _NET_WM_STATE_MAXIMIZED_HORZ
WM_HINTS(WM_HINTS):
  Client accepts input or input focus: True
  Initial state is Normal State.
  bitmap id # to use for icon: 0xc0006d
  bitmap id # of mask for icon: 0xc00070
  window id # of group leader: 0xc00001
XdndAware(ATOM) = BITMAP
_MOTIF_DRAG_RECEIVER_INFO(_MOTIF_DRAG_RECEIVER_INFO) = 0x6c, 0x0, 0x5, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0
_NET_WM_ICON(CARDINAL) = Icon (48 x 48):
_KDE_OXYGEN_BACKGROUND_GRADIENT(CARDINAL) = 1
_NET_WM_SYNC_REQUEST_COUNTER(CARDINAL) = 12582994
_NET_WM_WINDOW_TYPE(ATOM) = _NET_WM_WINDOW_TYPE_NORMAL
_NET_WM_USER_TIME(CARDINAL) = 153409646
_KDE_NET_WM_USER_CREATION_TIME(CARDINAL) = 62984054
_NET_WM_USER_TIME_WINDOW(WINDOW): window id # 0xc00051
WM_CLIENT_LEADER(WINDOW): window id # 0xc00001
_NET_WM_PID(CARDINAL) = 26036
WM_LOCALE_NAME(STRING) = "en_US.UTF-8"
WM_NORMAL_HINTS(WM_SIZE_HINTS):
  program specified resize increment: 8 by 15
  program specified base size: 2 by 18
  window gravity: NorthWest
WM_PROTOCOLS(ATOM): protocols WM_DELETE_WINDOW, WM_TAKE_FOCUS, _NET_WM_PING, _NET_WM_SYNC_REQUEST
WM_CLASS(STRING) = "terminator", "Terminator"

Also there is no difference between the two states except the geometry of course...