Reimplement colorized data relocation hover diffs

[LagoLunatic]

#154 161dadd Change font color for nonmatching relocs on hover

[encounter]

Maybe we can add separators before “Relocation”? That might help it visually flow better. I also think we can ignore custom colors (like Virtual address) in this case, acting more like a “override”, if that makes sense.

[LagoLunatic]

Looks like this now:

I didn't override the color of "Extern", because that's not a label but the value text. If I implement red/green for values then all the grey text also shows as red/green, which I thought looked like too much of all one color:

[encounter]

Looks good, thank you!