Bug 395436

As mentioned in the tile, if taskbar is moved to the left side of the screen and auto-hide is on, the animation of "unhide" is executed twice if the mouse pointer is kept touching the left edge

Running:
* KDE Plasma Version: 5.12.5
* KDE Frameworks version: 5.46.0
* Qt Version: 5.11
* Kernel Version 4.14.40-1-MANJARO
* Two monitors, side by side, with taskbar on the left monitor

How to reproduce:
1) Move taskbar to the left of the screen and enable the auto-hide option
2) Let it hide
3) Move the mouse to the left edge of the screen
>>>> The taskbar will come up once,
4) Keep the mouse touching the right edge of the screen for a little longer (half a second)
>>>> If the mouse is still touching the edge of the screen for another half a second the taskbar flashes (disappears and comes up from hidden again)

Thus it effectively executes the animation twice.
Note that if you touch the edge and remove the mouse from there, the animation is only executed once.

Thanks