Expunge the use of the word component from Eeschema code.

The only exception to this is the SPICE simulator's use of component
when referring to physical component (R, L, C, etc.) values.

eeschema/sch_edit_frame.cpp

@@ -1617,7 +1617,7 @@ void SCH_EDIT_FRAME::SaveSymbolToSchematic( const LIB_SYMBOL& aSymbol )
 
     wxCHECK( selectionTool, /* void */ );
 
-    EE_SELECTION& selection = selectionTool->RequestSelection( EE_COLLECTOR::ComponentsOnly );
+    EE_SELECTION& selection = selectionTool->RequestSelection( EE_COLLECTOR::SymbolsOnly );
 
     if( selection.Empty() )
         return;