Add configuration directory path to help window
Add `Runtime Directories Path` section to `Build Information` tab in `Help->About` window.
Testing Done:
Compile and run
![Changed](https://i.ibb.co/c3BvQMj/Screenshot-from-2021-03-28-04-28-52.png)
Bugs closed: PIDGIN-17504
Reviewed at https://reviews.imfreedom.org/r/577/