Action column menu does not stay over the action column

[tzyganu]

I've added my own column in the CMS Page admin grid, and because the grid state is kept in the database, and I have previously visited the cms page grid, my column is added last.
This is just part of a problem. I can do with that, but now the actions dropdown appear over my column instead of the actions column itself.
See screenshot for more details

[vzabaznov]

Please, provide the used version. If the problem is actual for a specific branch, please, specify it and be sure that the latest update was used.

[tzyganu]

@vzabaznov The problem stil exists in the develop branch.
Here is a screenshot that includes the version number:

Steps to reproduce:

• Open the admin panel.
• Go to the cms pages list: Content->Pages (from the main menu)
• After the grid is rendered add this code in the file app/code/Magento/Cms/view/adminhtml/ui_component/cms_page_listing.xml (I edited that file to make it easier to explain. It also happens if I add a new column using the file cms_page_listing.xml from my module also)

      <column name="dummy1">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="filter" xsi:type="string">text</item>
                    <item name="label" xsi:type="string" translate="true">Dummy 1</item>
                </item>
            </argument>
        </column>
        <column name="dummy2">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="filter" xsi:type="string">text</item>
                    <item name="label" xsi:type="string" translate="true">Dummy 2</item>
                </item>
            </argument>
        </column>

• Refresh the pages list.
• click on the actions link for the first item in the grid.

Expected Result:

• My 2 columns should appear last in the grid.
• The available actions should appear over the actions column

Actual Result:

• My 2 columns appear last in the grid
• The available actions appear over my last added column (as shown in the screenshot above).

[xmav]

Hi @tzyganu, thanks for reporting this issue. Internal ticket MAGETWO-58235 was created.

Thanks,
Maksym