Allow pseudo-exalted melees to proc Primary/Sec. Dexterity

[T-Shark69]

It seems like exalted meleee weapons that can be moded, (Exalted Blade, Valkyr's Claws etc) can proc Dexterity arcanes while those that are based on your melee weapon's mods do not (Landslide, Khora's Whip etc.).
I understand the differences between the two and I know that code wise they might not be the same at all, but in practice they're basically melee weapons and they are based on melee weapons mods while also counting as melee kills in the mission end stats. It would be nice to have the bonus working for these frames instead of just slotting Merciless, since switching to melee for the kill would break the flow.