Zaklady w trakcie
The Pending Bets window is only shown when there are pending bets that have not met their condition yet. When rolled up in the Main Info Bar the header displays the number of pending bets.

When expanded the window displays all of the pending bets.

Opcje
By right clicking on the header it brings up the various options for this window.

Cancel All Bets - cancels all pending bets
On Removed Runner - Defines behaviour when a horse is withdrawn from the market.
Nic nie rób - Pending bets are retained.
Anuluj wszystkie zakłady - Pending bets for the market are cancelled.