**Bugzilla author:** `lar`
**Description:**
Often, there are standard block message templates that are in use (this varies by wiki) or standard block reasons in use (this also varies by wiki) all of which it would be convenient to present in a dropdown list. The list of templates could be a new MediaWiki message, similar to how [[https://en.wikipedia.org/wiki/MediaWiki:Licenses|MediaWiki:Licenses]] sets the license dropdown on [[https://en.wikipedia.org/wiki/Special:Upload|Special:Upload]].
For best results, since the templates often take parameters, after the selection is made, the wikitext of the template should then be editable so parameters can be included or additional text added or whatever, as now.
This dropdown enhancement request applies to all three of the fields
* Replace user pages with:
* Replace talk pages with:
* Reason:
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**Acceptance criteria**
* In the CheckUser [[https://phab.wmfusercontent.org/file/data/ntivpzd2fybkdan3dzkb/PHID-FILE-l436mnearxjt3d2n2kxw/CheckUserBlocker.png|interface]], add dropdowns in front of the following three text fields:
** Replace user pages with:
** Replace talk pages with:
** Reason:
* Default text should be "Select optional preload..."
* When an option is selected in the dropdown, it should...
** a) replace the contents of the text field
** b) postpend to the contents of the text field (note: we are discussing a vs b in the comments)
* The contents of the dropdowns should pull from three new MediaWiki: messages, which are customizable by users with the `editinterface` permission