Synchronization-with-master-password workflow still not flawless.
SpeedDial shows this banner:
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Clicking the button leads to this, 'cause I'm already logged in:
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Now choosing (red arrow) "Synchronize your data" beams you into opera://settings/syncSetup:
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As you can see – there is no provision to enter your master password! Consequently the account toolbar dropdown sill looks like this:
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