Admin usability: required attribute for input fields #802

It would be convenient to mark the required fields for input.
<input ... required="required" />
<textarea required="required" > (plugin tab)

And visually highlight them using css:

input:required, textarea:required {
        background-color: #...;
// or
        box-shadow: 0 0 5px #... inset;
}

Already done:
event=page&step=page_new
event=form&step=form_create
event=css&step=pour

Need to do:
event=section&step=section_edit
event=article
event=link&step=link_edit
event=category
event=admin&step=author_edit
event=plugin
Login form
Reset password form