This mod by akazik makes it so you only need to use 1 key to mount and dismount.
The One-Key-Mount™ — Simple to use, configured with Rock.
With this Addon you have only to remember one key (or use the button) for mounting and dismounting all of your mounts, including regular mounts, flying mounts, flight form and much more.
You can configure SmartMount with a nice GUI if you also install "LibRock-1.0", "LibRockConfig-1.0" and "LibRockLocale-1.0".
And with "LibPeriodicTable-3.1" SmartMount can also summon a random mini pet.