How is minting working? I can't find function that unlocks wallet

Open the debug window from the Help menu. Switch to the Console tab and enter the following:
walletpassphrase "yourWalletPassword" 1000000 true
Replace the text "yourWalletPassword" with your actual wallet password

Your wallet will start minting for 1000000 seconds now. It might take a couple of minutes to update the status bar though.
regs
Thomas