Fix for "flying" submenu in MassAction dropdown with large number of elements

[xmav]

Fix for "flying" submenu in MassAction dropdown with large number of elements

Description

Submenu in grid MassAction dropdown displayed under list of elements in case of large number of elements.

Manual testing scenarios

1. Update app/code/Magento/Catalog/view/adminhtml/ui_component/product_listing.xml and add dummy MassAction dropdown items before "Change Status"

 <action name="testMenu1">
                <settings>
                    <type>testMenu1</type>
                    <label translate="true">testMenu1</label>
                </settings>
            </action>
            <action name="testMenu2">
                <settings>
                    <type>testMenu2</type>
                    <label translate="true">testMenu2</label>
                </settings>
            </action>
            <action name="testMenu3">
                <settings>
                    <type>testMenu3</type>
                    <label translate="true">testMenu3</label>
                </settings>
            </action>
            <action name="testMenu4">
                <settings>
                    <type>testMenu4</type>
                    <label translate="true">testMenu4</label>
                </settings>
            </action>
            <action name="testMenu5">
                <settings>
                    <type>testMenu5</type>
                    <label translate="true">testMenu5</label>
                </settings>
            </action>
            <action name="testMenu6">
                <settings>
                    <type>testMenu6</type>
                    <label translate="true">testMenu6</label>
                </settings>
            </action>
            <action name="testMenu7">
                <settings>
                    <type>testMenu7</type>
                    <label translate="true">testMenu7</label>
                </settings>
            </action>
            <action name="testMenu8">
                <settings>
                    <type>testMenu8</type>
                    <label translate="true">testMenu8</label>
                </settings>
            </action>
            <action name="testMenu9">
                <settings>
                    <type>testMenu9</type>
                    <label translate="true">testMenu9</label>
                </settings>
            </action>
            <action name="testMenu10">
                <settings>
                    <type>testMenu10</type>
                    <label translate="true">testMenu10</label>
                </settings>
            </action>
            <action name="testMenu11">
                <settings>
                    <type>testMenu11</type>
                    <label translate="true">testMenu11</label>
                </settings>
            </action>

2. Login to backed
3. Go to Catalog -> Products
4. Open MassAction drop down scroll to Change Status and click
   Actual result:
   Submenu appears under dropdown elements list.
   

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)