Add progress bar for Extracting rootfs

I know it has been so frustrating to look at the same **Extracting rootfs** step for hours without knowing what knowing is it stuck or doing its job

its time to fix this

**BRANCH**: [revamp-v2.5](https://github.com/RandomCoderOrg/fs-manager-udroid/tree/revamp-v2.5)

> A little help is appreciated