Fix all autoFixable problems inside app/common

[Latropos]

Summary

Run eslint with --fix flag.
These test are broken since when introducing monorepo we unified eslint rules and made them more demanding.

Most of the changes is to prefer import type.

The others are:

• Remove type cast when its not needed

• Don't have unnecessary conditions

• Use property shorthand

• When possible use const instead of let

Test plan

All changes were made automatically.

[piaskowyk]

Seems ok 👍