fixup! erp5_web_renderjs_ui_test: add a test on precision of float fields

Add missing field, used in testFloatFieldStep

bt5/erp5_ui_test/SkinTemplateItem/portal_skins/erp5_ui_test/Foo_view.xml

@@ -119,6 +119,7 @@
                         <string>my_quantity</string>
                         <string>my_quantity_read_only</string>
                         <string>my_quantity_read_only_percent</string>
+                        <string>my_price</string>
                         <string>my_frozen</string>
                         <string>my_lines_list</string>
                       </list>