[v2.X] Extend unlocked wallet page width to full

[nop33]

Here's the "correct" fix of expanding the page to the fullest. I totally understand if you don't want to merge this, I tested as much as I could! It can wait till next release. Just putting it here so that I don't forget it.

[mvaivre]

Thanks 🙏 Yes, let's keep that for the next release!

[nop33]

Well, I messed up. I force pushed to the branch wednesday-fixes and I lost the changes. Lesson learnt: no branches named on week days...

I managed to restore it using the amazing git reflog. Everything back to normal.