Rework on TEXTE_PCB, SCH_TEXT and EDA_TextStruct classes.

Code seriously cleaned, obscure and duplicated code removed, and some oddities removed.
Better support of multiline texts.

pcbnew/class_pcb_text.cpp

@@ -193,7 +193,7 @@ void TEXTE_PCB::Draw( WinEDA_DrawPanel* panel, wxDC* DC,
 
     GRFillMode fillmode = FILLED;
     if ( DisplayOpt.DisplayDrawItems == SKETCH)
-        GRFillMode fillmode = SKETCH;
+        fillmode = SKETCH;
        
     EDA_TextStruct::Draw(
         panel, DC,