fix UI tests cleanup

[individual-it]

There have been at least multiple issues why the client config was not correctly cleaned up after the tests:

1. the accounts on the server have been deleted before the client cleanup, causing the client to be stuck in the login window
2. and child_widget.objectName caused the code to never go into that path, so the cleanup was never attempted
3. get_active_widget() has also to ignore widgets where the name is empty

[anon-pradip]

Looks like the access denied error is not produced again with this PR for those tests where Account toolbar appears in the last step in the AUT so that account cleanup happens properly . But in some scenarios the AUT doesn't get closed so that the clean up does not happen properly.
For example, Scenario: Check default options in advanced configuration:

Screencast.from.2025-11-03.11-55-22.mp4

Log Closing 'QFileDialog' window November 3, 2025 at 11:56:10 AM +05:45 C:\Users\vboxuser\projects\desktop\test\gui\shared\scripts\bdd_hooks.py:232

Detail Object '{container={container={name='dialogStack' type='QStackedWidget' visible='1' window={name='Settings' type='OCC::SettingsDialog' visible='1'}} name='quickWidget' type='OCC::QmlUtils::OCQuickWidget' visible='1'} type='RowLayout' visible='true'}' not found. Could not match properties:
    container for object name: '{container={container={name='dialogStack' type='QStackedWidget' visible='1' window=:settings_OCC_SettingsDialog} name='quickWidget' type='OCC::QmlUtils::OCQuickWidget' visible='1'} type='RowLayout' visible='true'}'
    type for object name: '{name='dialogStack' type='QStackedWidget' visible='1' window=:settings_OCC_SettingsDialog}'  C:\Users\vboxuser\projects\desktop\test\gui\shared\scripts\pageObjects\Toolbar.py:110

As we can see Toolbar is not found due to which the clean up does not happen properly. And when we run test again, we get the access denied error

[individual-it]

Hmm, in those cases we need to click "cancel" and then no cleanup should be needed or "finish" and then do the normal cleanup

[individual-it]

@anon-pradip please review again I found an other issue and fixed it