gui: Add select all menu (Bug #41797) * libgui//qterminal/libqterminal/QTerminal.h: Add selectAll popup menu and virtual function. * libgui/qterminal/libqterminal/unix/QUnixTerminalImpl.cpp,h: Add selectAll function. * libgui/qterminal/libqterminal/unix/TerminalView.cpp,h: add selectAll function. * libgui/qterminal/libqterminal/win32/QWinTerminalImpl.cpp,h: Add selectAll function. * libgui/src/documentation-dock-widget.cc,h: Add selectAll function. * libgui/src/files-dock-widget.cc,h: Add selectAll function. * libgui/src/history-dock-widget.cc,h: Add selectAll function. * libgui/src/m-editor/file-editor-tab.cc,h: Add select_all function and signal. * libgui/src/m-editor/file-editor.cc,h: Add request_selectall and selectAll function, add Edit->select all menu. * libgui/src/main-window.cc: add selectAll function, selectAll menu. * libgui/src/octave-dock-widget.cc,h: Add virtual selectAll function and connect to mainwindow selectall signal. * libgui/src/qtinfo/webinfo.cc,h: Add selectAll function. * libgui/src/workspace-view.cc,h: Add selectAll function.

GNULIB_LINK_DEPS = \
  $(COPYSIGNF_LIBM)\
  $(COPYSIGN_LIBM)\
  $(FLOORF_LIBM)\
  $(FLOOR_LIBM)\
  $(GETHOSTNAME_LIB)\
  $(LIBSOCKET)\
  $(LIB_NANOSLEEP)\
  $(LIB_SELECT)\
  $(LTLIBINTL)\
  $(ROUNDF_LIBM)\
  $(ROUND_LIBM)\
  $(TRUNCF_LIBM)\
  $(TRUNC_LIBM)

LIBOCTAVE_LINK_DEPS = \
  $(GNULIB_LINK_DEPS) \
  $(CURL_LIBS) \
  $(SPARSE_XLIBS) \
  $(ARPACK_LIBS) \
  $(QRUPDATE_LIBS) \
  $(FFTW_XLIBS) \
  $(LAPACK_LIBS) \
  $(BLAS_LIBS) \
  $(READLINE_LIBS) \
  $(TERM_LIBS) \
  $(LIBGLOB) \
  $(PCRE_LIBS) \
  $(DL_LIBS) \
  $(PTHREAD_LIBS) \
  $(FLIBS) \
  $(LIBS)

LIBOCTAVE_LINK_OPTS = \
  $(CURL_LDFLAGS) \
  $(SPARSE_XLDFLAGS) \
  $(ARPACK_LDFLAGS) \
  $(QRUPDATE_LDFLAGS) \
  $(FFTW_XLDFLAGS)