[IMP] storage_media: form select only same category backend

Author: simahawk

storage_media/views/storage_media_view.xml

@@ -35,7 +35,11 @@
                         <field name="url" readonly="True" widget="url" />
                         <field name="name" />
                         <field name="media_type_id" />
-                        <field name="backend_id" />
+                        <field name="backend_categ_id" invisible="1" />
+                        <field
+                            name="backend_id"
+                            domain="[('categ_id', '=', backend_categ_id)]"
+                        />
                     </group>
                 </sheet>
             </form>