Display is not proper when double click on version of the list in web content

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP FP33, 7.0.X, Master
• Fix Version/s: 7.1.0 M1, 7.1.X, Master
• Component/s: Content Display Widgets > Web Content Search widget
• Labels: None
• Story Points: 1
• Fix Priority: 4
• Git Pull Request: https://github.com/liferay/com-liferay-journal/pull/572

Steps to reproduce:

1. Creat some web contents
2. Input some content in search box -> click search
3. Click Versions
4. Double click one version and drag it somewhere else (Note: Don't release the mouse.)

Expected result:
There should be no boxes.

Actual result:
1. There is a box and no operation can be performed within this box.
2. If you switch to webcontent, the box is still displayed in the same location on this page.