Fix some crowded controls and the splitter style in the Mac main window.
Fix some crowded controls and the splitter style in the Mac main window.

spacedockapp/spacedock,tblackwe/spacedock,tblackwe/spacedock,spacedockapp/spacedock,tblackwe/spacedock,spacedockapp/spacedock,tblackwe/spacedock,tblackwe/spacedock,spacedockapp/spacedock,spacedockapp/spacedock,spacedockapp/spacedock,tblackwe/spacedock