This! Currently the transactions created in the Gnosis DAPP all have a gas limit of 3,000,000 (because for some transactions we indeed have been close to reaching it). However for a simple cashout you only need 21,000. This is not optimal - we should detect that a cashout transaction will cost less and set it directly to 21,000 and it would also be nice to just have an option - withdrawl all. But we are just getting started. We will get better every version.