you mean (temporarily) permanent "unlock" right? So you don't have to sign every time?
For now I have implemented that once you "broadcast" a message, you can flip the "slider" just above "sign & broadcast" which says: "do not prompt USER again for": DAPPCLIENT:OPERATION. So you won't get the dialog everytime but go straight to "wallet unlock" - - - which is quite fast with fingerprint (android + ios) and face id.