IBX-10848: Changed notifications z-index to cover help center btn

[albozek]

🎫 Issue	IBX-10848

Related PRs:

• https://github.com/ibexa/integrated-help/pull/10
• https://github.com/ibexa/icons/pull/68
• https://github.com/ibexa/page-builder/pull/469
• https://github.com/ibexa/image-picker/pull/126
• https://github.com/ibexa/image-editor/pull/120

Description:

In addition to changes in design, changing current maximum z-index in the system from 99999 to 10300 after introducing integrated-help feature. The change is made in order to avoid excessively high indices in the project.
After the changes are implemented, the highest index will be set as follows:

1. 10300 - notifications as elements with the highest z-index
2. 10200 - help center trigger button/dialog
3. 10100 - image editors/picker

Description:

For QA:

Documentation:

[Copilot]

Pull Request Overview

This PR updates the z-index value of notifications to ensure they appear above the help center button.

Key Changes:

• Increased the z-index of the notification container from 50000 to 100010

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[pawlakadrian]

Still we have 2 situation to resolve:

1. The notification is covering the button with the help icon, but it's still partially visible and unevenly covered.

2. This is the location selection view, where the "Discard" button is immediately covered by the icon.

[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

[pawlakadrian]

QA Approved on DXP Commerce 4.6.x-dev