font.properties (e.g. font.pixelSize) aren't correctly resetted

All the font.properties (e.g. font.pixelSize, font.letterSpacing) aren't updated when calling reset from the ActionIndicator in the PropertyEditor.

How to reproduce:

1. Select a Text item
2. Change its pixelSize
3. Reset the pixleSize
4. SpinBox still contains the value even though it was correctly removed from the editor

This is a regression and was caused by this patch QmlDesigner: Fix Property Editor doesn't update binding properties
When reverting this line everything works as before: