Description of problem:
When hide buttons are enabled and the panel is hidden, toggling arrow
icons on hide buttons cause the panel to redraw incorrectly.

Version-Release number of selected component (if applicable):
2.8.1-1

How reproducible:
Always

Steps to Reproduce:
1. Open panel preferences for an expanded panel
2. Enable hide buttons and hide the panel
3. Toggle "Arrows on hide buttons"
  
Actual results:

The hide button from the hidden panel doesn't change when you enable
arrows, when you disable arrows a little bit of the panel is exposed.

Expected results:

Only the hide button should be visible when the panel is hidden and it
should show an arrow when arrows are selected.

Additional info: