Hide or reduce "Google Translate" logo

[zetxek]

Reported by @feppos0 in #2

Hide the "google translate" column at the top so the windows begin directly from the translating columns

I do not think we can neither should hide the Google Translate logo, as this application is just embedding the webapp, but we might be able to make it a little bit less intrusive, while keeping the Translate logo and image.