Missing css on textarea & errors marking is too broad for multiple fields on same line

[master]

Under the Admin, try to add-save an empty object of this example:

models.py:

class Test(models.Model):
    title = models.CharField(max_length=100, blank=True)
    presentation = models.TextField()

admin.py:

class TestAdmin(admin.ModelAdmin):
    fieldsets = (
        (None,   {'fields': (('title', 'presentation'), )}),
    )
admin.site.register(Test, TestAdmin)

The unexpected results are:

• there is no red border on the offending 'presentation' field
• the red border on the 'title' field is confusing, this field is not in error, as it can be empty

The proposed patch adds:

• the missing CSS rule on an erroneous textarea
• a way (to be cleanedup) to lower the error marking from the 'form-row' to the 'field-box' level, so that only the offending fields are pointed out.

[Julien Phalip]

This is clearly a usability bug. The patch is good. I've just improved it a little so that the behaviour remains the same if the line contains only one field (i.e. the 'errors' CSS class is applied to the 'form-row' div).

[Julien Phalip]

Improved patch

[Julien Phalip]

Improved patch

[Jannis Leidel]

(In [14999]) Fixed #13782 -- Added CSS for errors in textareas and multiple fields in one line. Thanks, julien.

[Jannis Leidel]

(In [15003]) [1.2.X] Fixed #13782 -- Added CSS for errors in textareas and multiple fields in one line. Thanks, julien.

Backport from trunk (r14999).

[Jacob]

Milestone 1.3 deleted