If you add folder to Favorites in Project Browser in one project, then open another project that doesn't have such folder and try to delete that folder from the Favorites - it will throw an exception

Reproduces on 2020.2.0a4 on both Windows 10 and Mac
How we can reproduce it
1 Create folder “test” in one project and add it to Favorites
2 Close that project
3 Create and open new project
4 Check Favorites section and you will see that “test” folder is there
5 Click on the “test” item (notice that folder doesn’t exist in this project)
6 The popup window "Folder not found" will appear with 2 buttons - press "Delete"
Actual results: Exception is thrown
ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
System.ThrowHelper.ThrowArgumentOutOfRangeException (System.ExceptionArgument argument, System.ExceptionResource resource) (at <fb001e01371b4adca20013e0ac763896>:0)