1.1.2dev: Use common template on Milestone edit and Admin milestone edit forms. Refs #11499.

The new template is `milestone_edit_form.html`.

The following changese were made to the template:
 * Use `span.hint` for date format hint.
 * Textareas span the width of the enclosing fieldset.
 * Disabled "There are no tickets ..." text when //Completed// is not checked.


git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@12858 af82e41b-90c4-0310-8c96-b1721e28e2e2
1.1.2dev: Use //Submit changes// everywhere instead of //Save//, for consistency. Refs #11499.


git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@12859 af82e41b-90c4-0310-8c96-b1721e28e2e2
1.1.2dev: Added license header to template. Refs #11499.


git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@12860 af82e41b-90c4-0310-8c96-b1721e28e2e2