# Core Engine Release 4.5
March 2024
We upgraded! What's new? Learn more about new features, technical changes and solved bugs in 4App Core Engine.
Note on upgrading: If you skip a version when upgrading, check all release and patch notes in between for important information. They apply cumulative.
Note on individualization: If your 4ALLPORTAL is highly customized or if you installed individual apps, please contact your implementation partner before upgrading. We recommend checking your custom contents, especially layouts and object renderers, carefully after an upgrade.
# New Features and Improvements
- Sliding list: The scroll buttons in a sliding list can now be activated with the Enter key.
- Toolbox loading animation: We have added a loading animation in the toolbox when the available actions for selected objects are still being determined.
# Technical Changes & Admin Instructions
# Changed Loading Behaviour of Editable Renderers
Editable renderers are now only created if it is clear whether a user has the right to edit or not. This avoids deleting the read-only renderer that was always created by default. This results in better performance.
# Solved Bugs
- Remove unexpected horizontal scroller in the object renderer set snap-ins
- Fix focus that was not set when tabbing in a drop-down menu (Firefox and Safari browsers)
- Fix focus that did not display for the time selection when tabbing in a date field pop-up (Firefox and Safari browsers)
- Fix focus that appeared for non-clickable BeanChips. They are not focussed anymore.
- Fix the not loading search results after scrolling in a sliding list
- Fix the wrong focus display in reference renderers
- Remove not working and not used proxy icons
- Fix setting focus after scrolling in the BufferedList
# How to Get These Improvements
- Upgrade 4App Core Engine to version 4.5
- No licensing required