mega.nz/file/CUkEVYCB#916pelx9FdM6fDoT7KP2Pc5dpEiDztSplz9C-X20G78
(catbox unavailable for a moment)

And done. Another shitty mod for Paradox.

Individual skills hider. In skills menu press Shift (by default, or whatever button designated as "A" in rpg maker) to hide/show a skill for in-battle skill menu. Exact same principle as for skill types. Mod respects "Display Skill Types" setting, so when it's on "Hide", hidden individual skills won't be displayed, and when it's on "Show all", hidden individual skills would be displayed just like skill types.
Affects autobattle and berserk, hidden individual skills won't be utilized in auto-battle, berserk. Though, has separate setting, in mod file (Auto_Battler = true), to make mod not affect auto battle/berserk.
No skills sorting. Not worth the hassle, desu.