Show-before-send currently asks for the password
and creates a signed tx before showing anything.
This is a little unnerving as you can't see what
you're being asked to sign.
This patch does a few things:
- Adds a description label to the TX dialog
- You see the tx before being asked for password;
that is only requested on pressing Sign
- in show-before-broadcast mode, the Send button
text is instead "Show...". Hook up this button
text change to the prefs dialog too.
- Remove many redundant imports. In particular
PyQ4 is checked in main_window.py so no need
in tx_dialog too.
Note I had to remove disabling of the Sign button,
because if the user presses "cancel" nothing will
re-enable it.
This is working towards showing transactions before asking for passwords.
I think it also means the transaction dialog now interacts properly with
plugins, whereas it didn't before.
send_tx now takes a callback instead of a label, and does not decide
on whether to broadast itself; that is left to its caller.
broadcast_transaction() takes care of adding the description of the
successfully broadcast transaction to the wallet. Previously labels
could be added to the wallet even if the broadcast was cancelled by
the user or unsuccessful, which doesn't seem right.
Lengthen the dialog messages a little, as some window managers lose the
"Please Wait" title bar owing to window decorations if the message
is too short.
The verifier will retain responsibility for verification, but will no longer
hold the transaction sets itself.
Change requires_fee to take a wallet.
Add new function add_unverified_tx()
Move get_confirmations() to the wallet from the verifier.
