Remove "pop up" Start Menu button (Windows 8.1)

I just updated to Windows 8.1 and i didn't like the new feature that pop ups an icon of the Start Menu button when you hover on the bottom left corner of the screen.
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It's pretty annoying when you try to reach the item on the left of the taskbar and accidentally reaches the corner, then that icon pop ups and you have to move your mouse away and then go again with more caution...
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Thanks :)