In the console, type
wallet_account_order_list
This will show all your pending orders. Your shorts will show up like this:
"*hex id*",{
      "type": "cover_order",
      "market_index": {
        "order_price": {
          "ratio": "*margin call rate, satoshi-based*",
          "quote_asset_id": 22,
          "base_asset_id": 0
        },
        "owner": "*address*"
      },
      "state": {
        "balance": *open amount in satoshis*,
        "last_update": "1970-01-01T00:00:00"
      },
      "collateral": *collateral in satoshis*,
      "interest_rate": {
        "ratio": "0.",
        "quote_asset_id": 20,
        "base_asset_id": 0
      },
      "expiration": "2015-06-01T11:12:13"
    }