QTabWidget tab text label is slightly obscured during hover event

[nickdademo]

Describe Your Environment

[Versions from your environment]

• QDarkStyle: 2.6.5
• OS: Windows 10
• Python: 3.6.5

[If used, please inform their versions]

• PyQt: 5.11.3

Language

Python (also observed in C++).

Description / Steps to Reproduce [if necessary]

[Description of the issue]

1. Move mouse over non-active tab page tab label

Actual Result

As shown below, "P" is obscured:

Expected Results / Proposed Result

No obscuring of text during hover event.

[Raincode]

Suggested Fix: Add the following to QTabBar::tab:top:!selected:hover in style.qss on line 1350:
padding: 0px;

-->

QTabBar::tab:top:!selected:hover {
    border: 1px solid #148CD2;
    border-bottom: 3px solid #148CD2;
    padding: 0px;
}

I can create a PR. Not sure why it's behaving that way. I fixed a similar bug a while back: #57

[dpizetta]

Closed due #130