Added missing translations

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>
Modified operation progress output to block the UI actions
and bring the progress display more prominently to user's attention.

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>
Added clear_output method

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>
Process exitstatus handling

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>