draw menu trigger using theme color

Author: kjk

src/Caption.cpp

@@ -560,7 +560,8 @@ static void DrawCaptionButton(DRAWITEMSTRUCT* item, MainWindow* win) {
             gfx.FillRectangle(&br, rc.x, rc.y, rc.dx, rc.dy);
         }
         // draw the three lines
-        COLORREF c = win->caption->textColor;
+        //COLORREF c = win->caption->textColor;
+        COLORREF c = gCurrentTheme->window.textColor;
         u8 r, g, b;
         UnpackColor(c, r, g, b);
         float width = floor((float)rc.dy / 8.0f);