[BUG] Bad path entry in `unittestbot.paths.sourceDirectories` parameter on Windows OS

[alexey-utkin]

Description
[BUG] Bad path entry in unittestbot.paths.sourceDirectories parameter on Windows OS

To Reproduce
Select in the tab UTBOT FOLDERS and then the project root folder on disk d:

Expected behavior
. entry in unittestbot.paths.sourceDirectories configuration parameter

Actual behavior
Wrong path c:/d:/.... in unittestbot.paths.sourceDirectories configuration parameter