ROU-11403: Enabling accessibility styling for Virtual Select

[OS-pedrolourenco]

This PR is for...

Sample page

What was happening

Accessibility styling was not being applied to Virtual Select's Dropbox since it is not present inside of the layout element, which in turn holds the accessibility class.

What was done

• The accessibility class has been added to the dropbox if also present on the layout
• Focus styling changed from the toggle-all-button to the toggle-all-checkbox
• Fixed Dropbox options' focus outline

Test Steps

Screenshots

(prefer animated gif)

Checklist

• tested locally
• documented the code
• clean all warnings and errors of eslint
• requires changes in OutSystems (if so, provide a module with changes)
• requires new sample page in OutSystems (if so, provide a module with changes)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[BenOsodrac]

@OS-pedrolourenco the tests failed, please double-check if its something related to this or any flaky test, etc.