follow-up: 2aec7b74

[gui-test] try to find classpath urls in a synthetic classpath jar not for Windows only but for Linux also

First access to the field happens before editor component is added
to component tree, and value was initialized to near-zero value.
Actual zoom factor will be set later in `setImageProvider`.

Using 0 instead of 1 helps to avoid blinking when editor is first shown.

https://ea.jetbrains.com/browser/ea_reports/2004373 NPE fix: do not continue if template is finished

It no longer rejects paths with symlinks/junctions, but checks that they do not point to UNC paths.

Added link to the description of the algorithm.

EA-105820 - assert: RefactoringDialog.show

Step definition could be injected to another step definition like fixture.