Under file it should have "Write offline transaction" and "Put offline transaction online" or something along those words. Already has sign/verify message, sweet feature.
What are you talking about? The Bitcoin core wallet? Which wallet? If you want a wallet that does this, the Feature is already available for almost all wallet. (Sign message)
And if you want offline signing, the feature is already available as well;
https://bitcoinarmory.com/I think by "write offline transaction" he means there should be a feature in which we can make or submit offline transactions from bitcoin core and by "Put offline transaction online" he means that once the system gets online then submit or sync the transactions with the netwok.
This is what I mean..
One should have an offline computer, I'd like to sign a transaction on it, burn it to a CD and post it onto the blockchain from my online computer.
Seeing as security is pretty much the #1 issue.. this seems rather important to me.
Like i said, that feature is already available on armory. Bitcoin core only has basic necessities and always will, its meant as the core features wallet, not as a convenient wallet thats best for the end user.
Most users will want a SPV wallet first and then you can pick the features you want from the list of wallets on bitcoin.org.