[document_page] FIX creating history when there are no changes made. Add history name field, to name revisions. Modified views to allow setting this field.

[document_page] FIX BUG: UI hanging when editing content. This was due to the api.depends on _compute_diff. Removing it because it's not really necessary since the field is not stored.

[document_page] page_id should be readonly.

Improve active field

[document_page] Update version number

[UPD] Update document_page.pot

[MIG] document_page_multi_company (#188)

* [MIG] document_page_multi_company

Added this feature from the old module directly in document_page

document_page/models/document_page_history.py

@@ -14,12 +14,22 @@ class DocumentPageHistory(models.Model):
     _order = 'id DESC'
 
     page_id = fields.Many2one('document.page', 'Page', ondelete='cascade')
-    summary = fields.Char('Summary', index=True)
-    content = fields.Text("Content")
+    name = fields.Char(index=True)
+    summary = fields.Char(index=True)
+    content = fields.Text()
     diff = fields.Text(compute='_compute_diff')
 
+    company_id = fields.Many2one(
+        'res.company',
+        'Company',
+        help='If set, page is accessible only from this company',
+        related='page_id.company_id',
+        store=True,
+        index=True,
+        readonly=True,
+    )
+
     @api.multi
-    @api.depends('content', 'page_id.history_ids')
     def _compute_diff(self):
         """Shows a diff between this version and the previous version"""
         history = self.env['document.page.history']