[CLIENT] Masteries Name Error

If you name a masteries page the same as an other one without the caps it return an error.

exemple:

1. create a masteries page name Nautilus jungle (dont forget to do the caps).
2. create a second page name Nautilus Jungle (again dont forget the caps).
3. when you switch page you should reseve an error.

I guest this error is cause by the fact that you do the toLowerCase() after your if statement.