ROU-11287: [OSUI] - Defect with Skip to Content link

[JoaoFerreira-FrontEnd]

This PR is for fixing an accessibility issue on the skipToContent link.

What was happening

• A tabIndex= "0" was added to the main content but removed, and that should only happen after the focus changes to another element.

What was done

• remove tabIndex on a target blur listener;
• add blur function to remove tab index and listener;

Test Steps

1. Reach skip to content link using TAB navigation and trigger it
2. Check the main-content element on the dom has tabindex=”0”
3. Use tab or mouse to navigate to other element
4. Check the main-content element on the dom doesn’t have tabindex anymore
5. Check the blur listeners of main-content element, it should have been removed

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 SonarCloud