5.0.0 Alpha 10

#1849: Fix issues with parsing language strings during install or upgrade
#1848: Force upgrade login to use email address
#1813: Avif support
#1673: Redo menu manager UI in the ACP
#1815: Fix issues from v4 merge
#1816: Move guest message to the proper location
#1821: Add front-end language string
#1822: Fix issues with adding and editing database templates
#1823: Fixed issue when displaying uninstalled apps
#1824: Audit extension and listener stubs
#1825: Implement onFinish method in the Loader extension
#1826: Fix positioning of user account menu
#1837: Used the lowercase datetime call where applicable
#1839: Make custom template name and type required
#1840: Remove custom templates on application uninstall
#1842: Assassinated the X Timeline widget
#1843: Fix typo in language string
#1844: Fix issues with copy a topic to a database that feeds to the same forum
#1818: Reduced the padding of the form/editor when editing a post
#1817: List markers no longer change when switching between the editor and rendered content
#1713: Add a setting to show/hide images on feed widgets
#1812: Optimization/node counters
#1808: Removed backdrop-filter from search button to fix laggy UI in Chrome
#1804: Fix TypeError when saving CSS templates
#1805: Fix forum icons not displaying
#1807: Fixed UI of Ignore list, including clipped ipsMenu
#1801: Reverted .ipsMenu to fixed widths instead of min-width
#1803: Fix error on upgrading theme editor settings
#1797: Much faster positioning
#1802: Don't attempt to load legacy applications
#1798: Improved the rendering performance of some UI elements