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Wagtail 2.15 release notes - IN DEVELOPMENT
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Wagtail 2.15 is designated a Long Term Support (LTS) release. Long Term Support releases will continue to receive maintenance updates as necessary to address security and data-loss related issues, up until the next LTS release (typically a period of 12 months).


What's new
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Other features
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 * Add the ability for the page chooser to convert external urls that match a page to internal links, see :ref:`WAGTAILADMIN_EXTERNAL_LINK_CONVERSION` (Jacob Topp-Mugglestone. Sponsored by The Motley Fool)
 * Added "Extending Wagtail" section to documentation (Matt Westcott)
 * Support ``min_num`` / ``max_num`` options on ListBlock (Matt Westcott)
 * Added a `background_position_style` property to renditions. This can be used to crop images using its focal point in the browser. See :ref:`rendition_background_position_style` (Karl Hobley)
 * Added a distinct ``wagtail.copy_for_translation`` log action type (Karl Hobley)
 * Add a debug logger around image rendition generation (Jake Howard)
 * Convert Documents and Images to class based views for easier overriding (Matt Westcott)
 * Isolate admin URLs for Documents and Images search listing results with the name `'listing_results'` (Matt Westcott)
 * Removed `request.is_ajax()` usage in Documents, Image and Snippet views (Matt Westcott)

Bug fixes
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 * Delete button is now correct colour on snippets and modeladmin listings (Brandon Murch)
 * Ensure that StreamBlock / ListBlock-level validation errors are counted towards error counts (Matt Westcott)
 * InlinePanel add button is now keyboard navigatable (Jesse Menn)
 * Remove redundant 'clear' button from site root page chooser (Matt Westcott)
 * Make ModelAdmin IndexView keyboard-navigable (Saptak Sengupta)
 * Prevent error on refreshing page previews when multiple preview tabs are open (Alex Tomkins)
 * Admin fields and Icon visibility issues in Windows high contrast mode (Dmitrii Faiazov)
 * `blocks.MultipleChoiceBlock`, `forms.CheckboxSelectMultiple` and `ArrayField` checkboxes will now stack instead of display inline to align with all other checkboxes fields (Seb Brown)

Upgrade considerations
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