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/dialogs/dialog_plot_schematic.cpp

@@ -785,10 +785,10 @@ void DIALOG_PLOT_SCHEMATIC::createPDFFile( bool aPlotAll, bool aPlotDrawingSheet
     SCH_SHEET_PATH  oldsheetpath = m_parent->GetCurrentSheet();     // sheetpath is saved here
 
     /* When printing all pages, the printed page is not the current page.  In
-     * complex hierarchies, we must update component references and others
+     * complex hierarchies, we must update symbol references and other
      * parameters in the given printed SCH_SCREEN, accordant to the sheet path
      * because in complex hierarchies a SCH_SCREEN (a drawing ) is shared
-     * between many sheets and component references depend on the actual sheet
+     * between many sheets and symbol references depend on the actual sheet
      * path used
      */
     SCH_SHEET_LIST sheetList;
@@ -967,10 +967,10 @@ void DIALOG_PLOT_SCHEMATIC::createPSFile( bool aPlotAll, bool aPlotFrameRef,
     PAGE_INFO       plotPage;                                    // page size selected to plot
 
     /* When printing all pages, the printed page is not the current page.
-     * In complex hierarchies, we must update component references
-     *  and others parameters in the given printed SCH_SCREEN, accordant to the sheet path
-     *  because in complex hierarchies a SCH_SCREEN (a drawing )
-     *  is shared between many sheets and component references depend on the actual sheet path used
+     * In complex hierarchies, we must update symbol references and other parameters in the
+     * given printed SCH_SCREEN, accordant to the sheet path because in complex hierarchies
+     * a SCH_SCREEN (a drawing ) is shared between many sheets and symbol references
+     * depend on the actual sheet path used.
      */
     SCH_SHEET_LIST  sheetList;