Feature Request: Option position MatProgressButtonIcon

[wutkaru]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request

Versions

Angular CLI: 9.1.6
Node: 12.18.3

Desired functionality

[options] of MatProgressButtonIcon can set icon position before and after text

[wutkaru]

I have created demo by custom class

Demo Stackblitz