The QTabBar title is not displayed while moving a QTabBar.

The QTabBar title is not displayed while moving a QTabBar.

To reproduce the issue:

    - Launch designer.exe

    - Open the file "bug_qtabbar_with_bug.ui"
    - Press CTRL+R in order to execute the Widget
    - Move "Tab 2" to the left of "Tab 1"

 => The "Tab 2" is not displayed (or shifted) while dragging.

The issue does not appear if  the styleSheet of the QTabWidget is edited by doing:

• Removing the following lines from the QTabBar::tab {} block:
  border-right: 0px solid #141414;
  border-top: 2px solid transparent;
  padding: 3px 6px 3px 3px;

• Removing the following lines from the QTabBar::tab:selected {} block:
  border-top: 2px solid #1a8dff;
  border-right: none;