merge adjacent octave namespace blocks in libgui/graphics header files * BaseControl.h, ButtonControl.h, ButtonGroup.h, Canvas.h, CheckBoxControl.h, ContextMenu.h, EditControl.h, Figure.h, GLCanvas.h, ListBoxControl.h, Menu.h, Object.h, Panel.h, PopupMenuControl.h, PushButtonControl.h, PushTool.h, RadioButtonControl.h, SliderControl.h, Table.h, TextControl.h, ToggleButtonControl.h, ToggleTool.h, ToolBar.h, ToolBarButton.h, qt-graphics-toolkit.h: Merge adjacent octave namespace blocks.

Name: @PACKAGE_NAME@
Description: C++ interface to GNU Octave underlying library.
URL: https://www.octave.org
Version: @PACKAGE_VERSION@
Requires:
Requires.private:
Libs: -L@octlibdir@ @LIBOCTAVE@
Libs.private: @LIBOCTAVE_LINK_DEPS@
Cflags: -I@octincludedir@/..