* More helpful message if javascript is not activated.
* Clearer message when noJS
* Updating the CSS to make the noJS message look nicer on mobile version.
A form field with multiple checkboxes may introduce submissions that have more than one value. The `send_email` function would loop through all form fields and grab only the first item of each field, ignoring fields that may have multiple values selected. This is a side effect of using `QueryDict.get()`, which will only return the last value of a list.
This commit fixes that by first converting the `QueryDict` instance to a regular dict of lists so that `get` will return all values, then joining multiple items if needed.
Update page privacy form with login/group options
Add unit tests for setting group-based permissions
Add a basic login page to wagtailcore
Implement front-end logic for group and login-based permissions
Allow overriding the frontend login template name with WAGTAIL_FRONTEND_LOGIN_TEMPLATE
Add documentation for customising the login page
Add message on login page for authenticated users who don't have access
Using the new `Page.objects.first_common_ancestor()`, page choosers that
are restricted to a certain page type start at the most relevant parent
page to make selecting a page easier.
Accessing any of these attributes before importing `wagtailadmin.edit_handlers` would raise a `AttributeError`. In some cases this would mask the actual error; e.g. forgetting to import `wagtailadmin.edit_handlers`.
* `result_row_display` adds a `data-object_pk` attribute to each row, to make items easier to identify with JS
* Adds `get_extra_attrs_for_row()` method to `ModelAdmin`, to give developers a way of adding further attributes to the `<tr>` element
Having `get_image_model` at `wagtail.wagtailimages` is consistent with
django.contrib.auth.get_user_model, and means developers can import
`get_image_model` in an environment where models are not yet ready.
`get_image_model_string` has been added for uses where the model itself
is not required, and might not be available, but a reference to the
possibly swapped out Image model is required.
