My Calendar 3.4.0 beta 1

• Feature: import and export calendar settings.
• Bug fix: User category limits need to be configurable for all users who can add events.
• Bug fix: User category limits should limit the categories selectable by users, not just those editable.
• Bug fix: Default events screen says 'All' but only showed 'Published'
• Bug fix: Quick publish of a draft should keep user in draft events list.
• Bug fix: Don't repeat geolocation queries if a location does not have valid data.
• Bug fix: Should only require 'Add Events' permissions to set user categories.
• Bug fix: Category list did not filter out unavailable categories.
• Bug fix: Location slug callback had bad typos.
• Bug fix: Fix PHP notice if $templates not an array.
• Bug fix: Fix JS for list view to handle if an event has a language change.
• Bug fix: Mini URL used incorrectly.
• Bug fix: If primary category is already private, no need to check whether a private category is asigned.
• Change: Manage settings in a single database option rather than individual options.
• Change: Improved design on print view.
• Change: Support 'current' as an argument in a comma-separated list of users.
• Change: Updates to support future changes in My Calendar Pro.
• Change: Use core functions to check file mime types.
• Feature: Migrate CSS to custom file locations.
• Performance: caching of icon list data.
• Accessibility: Improve aria-label patterns so user settings override.
• Accessibility: Omit aria-label if link text is already unique.
• PHP 8.1 Compatibility fixes.
• Remove a couple very long deprecated functions.
• Prep for removal of core CSS editing.
• New default stylesheet.
• REST API support for outputting events.
• Prep work for new templating framework.