If the developer had overridden MESSAGE_TAGS in their site, Wagtail
messages used these classes in the admin. This caused the messages to
lose their styles.
Wagtail now ignores the MESSAGE_TAGS setting, using the default classes
defined in `django.contrib.messages.constants.LEVEL_TAGS`.
Fixes #2551
Concatinating with settings.STATIC_URL is no longer reccomended for creating
URLs to static resources, because it doesn't take the configured storage engine
into account. For example, a site using S3 to store its static files will need
static URLs that link out to S3, rather than relative URLs within the same
domain.
I replaced it with django.contrib.staticfiles.templatetags.staticfiles.static()
in python example code, and the {% static %} tag in template examples.
Most of the samples were already 4-space indented, but a few were using 2-space,
which is both inconsistent and, when it happened with Python code samples,
incompatible with PEP8.
You get a lexer error from the document builder if you use "code-block:: json",
and the json-style highlighting ends up not being applied. So I switched it to
"code-block:: text".
Switching explorer from position absolute to position fixed.
I did it in a pure CSS way but it would be good to be able to modify jquery.dlmenu.js line 213 to avoid it adding automatically a CSS property top on the element.
Make collection field on document chooser upload respect user permissions
failing test for #2511 for image uploader
Make collection field on image chooser upload respect user permissions
The "icon-" prefix is automatically added in SettingMenuItem.
Using "icon-placeholder" as suggested would thus result in
the CSS class "icon-icon-placeholder".
