Add linking to block explorer on transaction outputs

[Arcticae]

Which components does the task require to be changed? (think hard pls)

sncast

Description

It's easier to just click on the link and have the browser open for you in the exact right place We should make this configurable just in case (have the user choose one of starkscan/voyager upon installation, or have a reasonable default). The default probably should be starkscan since it has better results on pagespeed, see reports: starkscan tx screen analysis voyager tx screen analysis starkscan frontpage voyager frontpage