Changelog for Asset Modeller 26.3.0

Changes

• Sort available assets in edge editor (PR, #7473)
• AI: Widen the sidebar and make its width customizable (PR, #7560)
• Sort assets in delete_many_assets so parent and child assets can be deleted in one function call (PR, #7550)
• Add detail view for multi-action events in Journal and Undo modal (PR, #7494)