more etags cleanups

Common/Gmsh.cpp

Common/Options.cpp

Fltk/GUI.cpp

Fltk/Main.cpp

Fltk/pluginWindow.cpp

Parser/Gmsh.tab.cpp

Parser/Gmsh.y

Plugin/Annotate.h

Plugin/Curl.h

Plugin/CutGrid.h

Plugin/CutParametric.h

Plugin/Divergence.h

Plugin/Eigenvalues.h

Plugin/Eigenvectors.h

Plugin/Evaluate.h

Plugin/Extract.h

Plugin/ExtractEdges.h

Plugin/ExtractElements.h

Plugin/FieldView.h

Plugin/GSHHS.cpp