message: Fix column sizing on macOS 11+
diff: @@ -682,6 +682,10 @@ void PoeditListCtrl::CreateColumns()
  #ifdef __WXOSX__
  NSTableView *tableView = (NSTableView*)[((NSScrollView*)GetHandle()) documentView];
  [tableView setIntercellSpacing:NSMakeSize(3.0, 0.0)];
  + #if __MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_16
  + if (@available(macOS 11.0, *))
  + tableView.style = NSTableViewStyleFullWidth;
  + #endif
  #endif
  m_colID = m_colIcon = m_colSource = m_colTrans = nullptr;
  @@ -808,7 +812,20 @@ void PoeditListCtrl::SizeColumns()
  int w = GetClientSize().x;
  #if defined(__WXOSX__)
  - w -= (GetColumnCount() - 1) * 3;
  + {
  + int visibleCols = 0;
  + auto colCnt = GetColumnCount();
  + for (auto c = 0; c < colCnt; c++)
  + {
  + if (!GetColumn(c)->IsHidden())
  + visibleCols++;
  + }
  + w -= 3 * visibleCols;
  + #if __MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_16
  + if (@available(macOS 11.0, *))
  + w -= 9;
  + #endif
  + }
  #elif defined(__WXGTK__)
  w -= 2;
  #endif
  