[New Feature] Separate Superweapon timer and sidebar text

[OmegaBolt]

Since it's become common to give superweapons special font characters as identifiable icons, it'd be nice to be able to set a separate UI string for the timer than the sidebar cameo. IMO it looks a bit silly seeing a special character on the sidebar, where it doesn't match everything else on there and isn't very useful, but it does make sense on the charge timers.

I would add a new tag such as:

[Superweapon]
ShowTimer.Label=STRING:MySuperweapon

If not set it defaults to the superweapon's UIName.