message: Change vblank width to 1 so it's less noisy zoomed out.
diff: @@ -637,7 +637,7 @@ void TraceWin::render_graph_vblanks( graph_info_t &gi )
  colors_t col = ( event.crtc > 0 ) ? col_VBlank1 : col_VBlank0;
  float x = gi.ts_to_screenx( event.ts );
  - imgui_drawrect( x, imgui_scale( 2.0f ),
  + imgui_drawrect( x, imgui_scale( 1.0f ),
  gi.y, gi.h,
  col_get( col ) );
  }
  