Display steps as tree

[TetianaKhomenko]

Is your feature request related to a problem? Please describe.

Users may have different test implementations and tests nesting. Such logs take much time to read and analyze them. So users want to have the ability to hide nested steps to see only high-level information first and then expand to see more logs or nested steps.

Describe the solution you'd like

1. Introduce the ability to automatically hide nested steps in the Test Result view by prefix (@DavertMik please provide more details on this). Those hidden steps should have the ability to expand as well.
2. Ability to configure prefix

Additional context

Needed in Test result detail view:

Needed in Test result Complete log view:

Run Report Test Result detail view and Complete log:

[TetianaKhomenko]

It would be convenient when by clicking on > you could expand/collapse the step

[littlefrontender]

@TetianaKhomenko hard to do

[LolikTest]

We want to have possibility to expand \ hide Steps By Default only 1st level should be visible, all inner steps should be hidden. By clicking on Step it should Expand

[TetianaKhomenko]

@DavertMik as far as I remember we plan to introduce some of your changes in the next release, am I right?

[TetianaKhomenko]

implemented