3.4.6.9 pre-release

It needs a lot of testing, especially for term manipulation: create, update, tags/cats remove/add on post editor page, all editor modes (LSB, Raw, Single). Thanks a lot!

• Improvement: Consistent term framework. Database operation "Clean Legacy Term Names" (at plugin settings page /wp-admin/options-general.php?page=qtranslate-x#import), which cleans up old imperfections of taxonomy framework.
• Improvement: editing of categories and tags in Raw Editor Mode WP Topic
• Improvement: using now native code for editing of terms. Script edit-tag-exec.js is no longer needed.
• Improvement: ML fields are now also highlighted with a color bar in Raw Editor Mode.
• Information: Translators acknowledgement section has been moved from qtranslate.php to /lang/translators-notes.txt to keep all translation-related updates in one folder.
• New Tool: Database operation "Split database file by languages" on page /wp-admin/options-general.php?page=qtranslate-x#import.
• Language preset: locale 'kk' (Kazakh, Қазақ тілі).