Matrix Layout enhancements

[Lord-Grey]

Summary

• Support gaps on Matrix Layout

What kind of change does this PR introduce? (check at least one)

• [ ] Bugfix
• [X] Feature
• [ ] Code style update
• [ ] Refactor
• [ ] Docs
• [ ] Build-related changes
• [ ] Other, please describe:

If changing the UI of web configuration, please provide the before/after screenshot:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [X] No

If yes, please describe the impact and migration path for existing setups:

The PR fulfills these requirements:

• [ ] When resolving a specific issue, it's referenced in the PR's body (e.g. Fixes: #xxx[,#xxx], where "xxx" is the issue number)

If adding a new feature, the PR's description includes:

• [ ] A convincing reason for adding this feature
• [ ] Related documents have been updated (docs/docs/en)
• [ ] Related tests have been updated

PLEASE DON'T FORGET TO ADD YOUR CHANGES TO CHANGELOG.MD

• [X] Yes, CHANGELOG.md is also updated

To avoid wasting your time, it's best to open a feature request issue first and wait for approval before working on it.

Other information: Fixes #1696