title: Field `alias_model` does not exist
body: <p>Trying to inherit model <code>note.note</code> in my form view but keep getting the error <code>Field "alias_model" does not exist</code>. I also inherit <code>note.note</code> in my models and my fields are added just fine.</p>
  
  <p>Here is my view:</p>
  
  <pre><code>&lt;record id="view_project_notes_form" model="ir.ui.view"&gt;
        &lt;field name="name"&gt;Project Notes Form View&lt;/field&gt;
        &lt;field name="model"&gt;note.note&lt;/field&gt;
        &lt;field name="inherit_id" ref="project.edit_project"/&gt;
        &lt;field name="arch" type="xml"&gt;
          &lt;data&gt;
            &lt;xpath expr="//notebook/page[1]" position="after"&gt;
              &lt;page string="Notes"&gt;
                &lt;field name="title" placeholer="Title"/&gt;
                &lt;field name="tag_ids"/&gt;
                &lt;field name="memo"/&gt;
              &lt;/page&gt;
            &lt;/xpath&gt;
          &lt;/data&gt;
        &lt;/field&gt;
      &lt;/record&gt;
  </code></pre>
  
  <p>and my model:</p>
  
  <pre><code>from openerp import models, fields, api
  
  class Notes(models.Model):
      _inherit = "note.note"
  
      title = fields.Char(string="Title")
      employee = fields.Many2many(string="Employee")
      modified_by = fields.Many2many(string="Modified By")
  </code></pre>
  
  <p>Any help is appreciated!</p>