[Insight] Refactored Tx Data with Boxes and Underlines

[MicahMaphet]

• Fieldset border boxes labeling tx details [1]
• Tx details uses all available space [2]
• Bullet point circle for unspendable transactions [3]
• Underline for tx header when showing details [4]

Old:

[1][2][4] New:

[3]

[MicahMaphet]

Copy text for TX id:

These changes are on the txdetail-copytext branch.

[kajoseph]

This looks good. Just a couple of pieces of feedback:

1. Let's change the color of the spent arrows to be #2850EF. It's a little easier on the eyes in dark mode.
2. Let's remove the cursor change from arrows that aren't links (e.g. unspent/unspendable outputs).