[SF][A11y][FlexibleColumnLayout] Last column region present on the page but visually there is no such region

[2bno1]

Bug Description

Last column region is still present even I didn't specify endColumn slot.

Expected Behavior

Last column region should not be present if it's not specified.

Steps to Reproduce

1. Go to https://codesandbox.io/s/flex-column-layout-wc-bpn692?file=/public/index.html
2. Open inspector
3. Note that last column region is present
   

Isolated Example

https://codesandbox.io/s/flex-column-layout-wc-bpn692?file=/public/index.html

Context

• UI5 Web Components version: latest
• OS/Platform: macOS
• Browser: Chrome
• Affected component: FlexibleColumnLayout

Priority

• Low
• Medium
• High
• Very High

The priority indicates the severity of the issue. To set the appropriate priority consider the following criteria:

• Breaks entire application or system - High or Very High
• Accessibility issue - Medium or High
• Functional issue - Medium or High
• Visual issue - Low or Medium

Note: The priority might be re-evaluated by the issue processor.

[dobrinyonkov]

Hello @SAP/ui5-webcomponents-topic-p,

The div wrappers for the columns slots are rendered even if the slots are not defined. Those divs are with role region which may be invalid from accessiblity POV.

We should remove the role attribute or even not render the empty divs, if possible.

Regards,
Dobrin