Specifically the Algarian Stormrider which has a different flavor of Vigor widget with customized colors. Apparently that's a whole different widget id. So now instead of checking for just the one vigor widget, we look up all widgets in the vigor set and use those to see if any vigor bar is showing.
Apparently other things are now using the game's UIWidgetPowerBarContainerFrame but we're forcing it to be hidden due to a variety of factors. This attempts to restrict the Hide behavior of that frame to only when we're Dragonriding.
Seems like UnitPowerMax for the AlternateMount power returns the actual max from PLAYER_ENTERING_WORLD until you mount and then dismount a Dragonriding mount. This wasn't previously the case.
Now we rely on the native widget info to tell us whether it believes it should be on or not.
I explicitly added what I believe to be the spell id for the new Grotto Netherwing Drake so it *should* work regardless, but then also discovered that the flying mount's UnitPowerMax is 0 unless you're on a Dragonriding mount, so that should be the longer-term fix for whenever old-world mounts add Dragonriding capability (10.1.5?).
This displays the Vigor charges for the player whenever they're on a Dragonriding mount (which is detected via explicit buff ID scanning from a hardcoded list...I'd like to make that more robust so I don't have to keep up with new mounts being added, but I'm not sure how to do it another way just yet). The Alternate Power bar is hidden if the Vigor module is enabled so that we don't end up with duplicate Vigor trackers (although right now it flashes on the screen before the mount buff is detected, so I'd also like to fix that...).
I've effectively had to implement my own Vigor module from scratch by poking into the internals of the Vigor widget by its ID in order to determine the recharge amount on the final Vigor charge because there's currently no API to get this information otherwise. Hopefully this gets added; if it does, I'll happily rip out this widget inspection junk. Aside from the partial charge stuff, this is just a skinned version of an Alternate Power indicator that only shows when the user is on a dragonriding mount. ClassPowerCounter doesn't sound like a particularly appropriate base class for this, but since Vigor is implemented as Alternate Power, it worked out nicely.
