[UI][NewProposal] New proposal page is odd-looking

[aguillon]

Using Firefox on desktop:

[rueshyna]

do you mind point out the odd-looking part?

[aguillon]

I mean the empty zone below the title of the page. I would expect the "Add a transaction" item to be more centered, closer to where the mouse previously was (left menu).

[rueshyna]

I see. We can move "Add a transaction" under title and added transactions on its right.