Add build comparison tab

[oboking]

A way to address mainly:
#4402
And perhaps also include this type of thing within this feature in the future:
#7816
#8817

Description of the problem being solved:

I myself always end up with one PoB application for my actual imported character from the game, and one application for the goal PoB I'm going for, and I think it's quite annoying having to juggle both windows while trying to figure out why your build might have differences in the numbers compared to the goal PoB. Figuring out what you are missing or why your aren't as strong as you thought you would be or why something isn't behaving as intended for a build can be quite tricky to spot, and maybe something like this could aid in that.

From the view of a build creator, it feels like pointing their users to compare their character with this might remove the need for a lot of personal diagnosing. The need for going to the comment section of a guide or chat of a content creator asking for help related to their guide could perhaps be alleviated a bit with something like this.

There are many ways the feature could be improved, but I think it serves most of my needs pretty good.

Video of feature:

newest_showcase.mp4

I would love to hear your guys input on it 😄

[Wires77]

I'll have to play with it once the league start work calms down. Just from the gif you need a ConfigSet dropdown too. You could use the Tree comparison feature in that tab to make direct comparison easier. Not sure how that ends up looking with different jewels and such, though.

We've previously been hesitant to add something like this because of performance concerns, but if this just compares the XML it might be okay.

[oboking]

Update: I have been using this during league start and I have at least found it really helpful. No more wondering why phox has more life regen than me, trying to figure out how captainlance got crit capped compared to my character, juggling two windows with the different trees/items/skills etc of your own character and the PoB you are aiming for.

I've done a few tweaks to the UI and code to make it more useful, and updated the showcase video with the updates. Nevertheless, there are definitely possibilities for further improvements within this feature and I would love to hear if you guys have any feedback.

[Riddle1001]

I have also used it during league. Thank you