Set automatic focus on 'Passphrase' text field when opening ".gpg" files.

[cfgnunes]

When I open a ".epd" file with a passphrase set, the focus is on 'Passphrase' text field. So, I don't need to use the mouse to click to start putting my password.

When I open a ".gpg" file, there is no focus. So, I need to use the mouse to click in the 'Passphrase' field to start putting my password.

I think this feature is important because it is a bit boring to use the mouse every time when I open a '.gpg' file.

I think fixing this is easy. When I have some time, I make this correction to the code and open a 'pull request'.

Best regards,

[cfgnunes]

Hi @evpo ! I've fixed this issue.

Please, accept the pull request #122

Thanks!