Misc tweaks

Remade old MR since I changed the old branch's name and couldn't push to it anymore

• Change Stone Vines to Nature and remove movespeed penalty

Right now this causes the tree to see nearly no use, and it gets the player killed randomly for moving when sustained. The talent is instant toggle anyways so it just adds tedium to use which is probably not worth it for the returns. Damage type for Stone Vines and Rockswallow changed to Nature since it seems to be one of the 3 thematic damtypes for SW but is barely present in the class, so here's another small source of it.

• Rebalance Elemental Harmony

Changed Elemental Harmony to use combatTalentScale for more reasonable scaling. Duration at all levels reduced to 5. Buffed roughly every other element to be more on par with the global speed bonus from fire (now 30% at TL5, 1.0). As of 1.6 players can't cancel this buff anymore and they also can't hit themselves with elements to reliably proc the one they want, therefore it's probably fine to bring the other elements to a more acceptable number.

• Lower throwing knives level requirements by half

Currently this can only be skilled every 8 levels, changed that to every 4 instead. Apparently it is to accommodate material tiers, but I think the talent is underperforming and similar talents work fine without such restrictions anyways(dream hammer, mutated hand). Maybe remove restriction entirely?

• Make Tumble manual target even with auto-accept target on

This targets enemies by default with auto-accept on, so it was changed to manual.
A bunch of talents probably need checks around this on a case-by-case basis but this is as much as I can do atm.

• Shadow and Arcane Cunning actually tell you how much Spellpower you gain on their tooltip now

Self explanatory, less obfuscated way to know how much you're getting

• Born into magic now actually gives 20% inc dam as advertised(up from 15%)

Tooltips shouldn't tell lies! 5% more isn't that strong anyways, higher could use the bump.