Improve scaled modifier precision

[Lothrik]

Certain modifiers were discarding their floating point values when being scaled by ModStoreClass:ScaleAddMod, leading to situations where things like +2% Critical Strike Chance on a Bottled Faith flask would not be affected by modifiers to Flask Effect until you reached a breakpoint, causing it to jump to the next integer value (+3% Critical Strike Chance in this example).

This problem affects a wide variety of modifiers; currently this PR only applies this change to base Critical Strike Chance and base Life Regen Percent.

This PR also addresses a minor display issue in the calcs breakdown where more modifiers (such as 25% more Evasion + 30% more Evasion) weren't displaying sufficiently high precision, leading to weird inconsistencies where one field would say you had 63% more Evasion, and another would display a x 1.62 more Evasion multiplier. This is purely a cosmetic change as later calculations always used the real value (not the inaccurate/formatted one).

[Lothrik]

There's a fair bit of discussion going on in Discord regarding Evasion and Armour scaling and depending on the results of that the changes I made to CalcBreakdown.lua and CalcSections.lua may be discarded, as it's possible PoE actually rounds cumulative more values to the nearest integer.

[Lothrik]

Added high precision support for every base leech modifier type.

[QuickStick123]

Fixes #2763 #1278 #4318 #4450