dotclear: Update to 1.23.1

upstream changes
----------------
Dotclear 2.23.1 - 2022-08-13
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  * Fix: Adding a new comment was buggy (front/back)

Dotclear 2.23 - 2022-08-13
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  * PHP 7.4+ is required, PHP 8.0/8.1 compliance
  * Remove Iconset management
  * Admin UI: Harmonize font size on different support (laptop, tablet, mobile)
  * Admin UX: Group more logically buttons on CKEditor toolbar
  * Core: New constant DC_DEFAULT_THEME, set to 'berlin'
  * Core: Use predefined constants for post statuses (dcBlog::POST_*)
  * Core: Use predefined constants for comment statuses (dcBlog::COMMENT_*)
  * Core: Deprecated global $core (or $GLOBALS['core']), use dcCore::app() instead
  * Core: Deprecated global $_ctx, use dcCore::app()->ctx instead
  * Core: Deprecated global $_lang, use dcCore::app()->lang instead
  * Core: Deprecated global $mod_files, use dcCore::app()->cache['mod_files'] instead
  * Core: Deprecated global $mod_ts, use dcCore::app()->cache['mod_ts'] instead
  * Core: Deprecated global $_menu, use dcCore::app()->menu instead
  * Core: Deprecated global $__resources, use dcCore::app()->resources instead
  * Core: REST server now accepts JSON format (experimental)
  * Fix: Use relative URL for attachments as far as possible
  * Fix: Remove select hiding mechanism when help is displayed
  * Fix: Loading of modules (plugins/themes) in safe mode
  * Fix: Message position on Quick entry submit (dashboard)
  * Fix: Select appearance on Safari (webkit engine)
  * Lib: Update CKEditor to 4.19.1
  * Lib: Update Codemirror to 5.65.7
  * Various bugs, a11y concerns and typos fixed
  * Some locales and cosmetic adjustments
  * Warning: Internet Explorer is not more officially supported (may still work weirdly)

(triaxx)