message: Fix event list pageup/pagedown not matching
diff: @@ -2196,7 +2196,7 @@ static float get_keyboard_scroll_lines( float visible_rows )
  if ( imgui_key_pressed( ImGuiKey_PageDown ) )
  scroll_lines = std::max< float>( visible_rows - 5, 1 );
  else if ( imgui_key_pressed( ImGuiKey_PageUp ) )
  - scroll_lines = std::min< float >( -visible_rows, -1 );
  + scroll_lines = std::min< float >( -( visible_rows - 5), -1 );
  else if ( imgui_key_pressed( ImGuiKey_DownArrow ) )
  scroll_lines = 1;
  else if ( imgui_key_pressed( ImGuiKey_UpArrow ) )
  