Open Trade Details: Header UI improvements

[rodvar]

Propose enhancements to the open trade details headers to improve UX for user.

• in bisq2 desktop description (price) should be above the value, but might not make sense for mobile
• Can Aligments and ui constraints be improved? how?
• should mediator details be added as in bisq2? if so, where?

[rodvar]

@jigglypuff-bsq would you like to take this one?