New Feature: add zIndex option

[nzbin]

Now the moveable-control-box has a css attr z-index: 3000. I don't know whether there has a option to modify its z-index.

[ccpu]

Use css rules:

https://github.com/daybrush/moveable/issues/478 https://github.com/daybrush/moveable/blob/808d27f102ac121fa2e9c4fb0d73ff926b727dce/custom_css.md#default-css

[daybrush]

Use style prop

<Moveable
style={{
    zIndex: 1000,
}}/>

[nzbin]

Use style prop

<Moveable
style={{
    zIndex: 1000,
}}/>

It's not working with Angular.