Material-ui: [Tooltip] make arrow a prop (boolean)

[goleary]

• [x] I have searched the issues of this repository and believe that this is not a duplicate.

Summary 💡

It would be awesome if arrow was just a prop that could be passed to the Tooltip component to avoid having to copy and paste a bunch of code from the example into my project. It would accept true or false (default false) and create an arrow for the tooltip.

Examples 🌈

Motivation 🔦

There are clearly a good number of people using the arrow on their tooltips from this library. Why not bake it into the library to cut down on the need to copy and paste code from the example docs?

[oliviertassinari]

@goleary Great idea 👍

[oliviertassinari]

Do you want to give it a try :)?

[goleary]

Sure, I will give it a shot.

[goleary]

@oliviertassinari
running into a small issue while trying to get setup:

Do you have a slack or some other method I can use for getting in touch other than polluting this issue's comments section?

[oliviertassinari]

@goleary Gitter

[Vitao18]

Hey, do you want some help on this issue?

[goleary]

@Vitao18 I think I've figured out my issues so I'm good for now. I'll let you know if I run into any more problems.