Renamed `startupSteps.py` to `commonInitSteps.py`.
Cleanup `Processes` folder (not used).
Moved `walletInitSteps.py` inside the own suite steps.
Added files flow diagram.
Closes#8353
- Created new test case `tst_signUpAndQuit`.
- Renamed `tst_settingsMenu` to `tst_mainSettingsSection`.
- Created specific `bdd_hooks.py` for test case `tst_mainSettingsSection` and `tst_userIdentity`.
Closes#8011