[FontIcon] Will be broken if you pass a color in the style prop

[chrisnojima]

Problem description

If you do

<FontIcon style={{color: 'red'}} hoverColor='green'/>

you'll see hoverColor is never used. This is because https://github.com/callemall/material-ui/blob/master/src/FontIcon/FontIcon.js#L99 does

style={prepareStyles(Object.assign(styles.root, style))}

styles.root is computed and will have the correct color based on state (green) but if you pass in color as a style prop it'll then promptly blow it away (same if you pass in color as a prop also).

Maybe it should give you a warning if you pass in a color prop to this component?

Steps to reproduce

Versions

• Material-UI: 15.x
• React: 15.x
• Browser: All

[oliviertassinari]

We have been porting the component on the v1-beta branch. We reimplemented it from the ground-up. While we haven't tested it, I think that the issue is most likely fixed on that branch. Hence, I'm closing it.
Still, we will accept PR fixes until v1-beta takes over the master branch.