Modular-Kicad milestone B), major portions:

*) Rework the set language support, simplify it by using KIWAY.  Now any major
   frame with a "change language" menu can change the language for all KIWAY_PLAYERs
   in the whole KIWAY.  Multiple KIWAYs are not supported yet.

*) Simplify "modal wxFrame" support, and add that support exclusively to
   KIWAY_PLAYER where it is inherited by all derivatives.  The function
   KIWAY_PLAYER::ShowModal() is in the vtable and so is cross module capable.

*) Remove the requirements and assumptions that the wxFrame hierarchy always
   had PCB_EDIT_FRAME and SCH_EDIT_FRAME as immediate parents of their viewers
   and editors. This is no longer the case, nor required.

*) Use KIWAY::Player() everywhere to make KIWAY_PLAYERs, this registers the
   KIWAY_PLAYER within the KIWAY and makes it very easy to find an open frame
   quickly.  It also gives control to the KIWAY as to frame hierarchical
   relationships.

*) Change single_top to use the KIWAY for loading a KIFACE and instantiating
   the single KIWAY_PLAYER, see bullet immediately above.

*) Add KIWAY::OnKiwayEnd() and call it from PGM_BASE at program termination, this
   gives the KIFACEs a chance to save their final configuration dope to disk.

*) Add dedicated FRAME_T's for the modal frames, so m_Ident can be tested and
   these modal frames are distinctly different than their non-modal equivalents.
   KIWAY_PLAYER::IsModal() is !not! a valid test during the wxFrame's constructor,
   so this is another important reason for having a dedicated FRAME_T for each
   modal wxFrame.

On balance, more lines were deleted than were added to achieve all this.

pcbnew/editmod.cpp

@@ -28,6 +28,7 @@
 
 #include <fctsys.h>
 #include <kiface_i.h>
+#include <kiway.h>
 #include <confirm.h>
 #include <class_drawpanel.h>
 #include <pcbnew.h>
@@ -74,20 +75,13 @@ void PCB_EDIT_FRAME::InstallModuleOptionsFrame( MODULE* Module, wxDC* DC )
 
     if( retvalue == 2 )
     {
-        FOOTPRINT_EDIT_FRAME* editor = FOOTPRINT_EDIT_FRAME::GetActiveFootprintEditor( this );
-
-        if( !editor )
-        {
-            KIFACE_I&   kf = Kiface();
-
-            editor = (FOOTPRINT_EDIT_FRAME*) kf.CreateWindow( this, FRAME_PCB_MODULE_EDITOR, &Kiway(), kf.StartFlags() );
-        }
+        FOOTPRINT_EDIT_FRAME* editor = (FOOTPRINT_EDIT_FRAME*) Kiway().Player( FRAME_PCB_MODULE_EDITOR, true );
 
         editor->Load_Module_From_BOARD( Module );
         SetCurItem( NULL );
 
         editor->Show( true );
-        editor->Iconize( false );
+        editor->Raise();        // Iconize( false );
     }
 }