Component properties window can grow outside visible screen space

The component properties window can grow higher than the visible screen space. As a result, the 'save' button will be placed outside the screen (see screenshot).

Steps to reproduce:
1. login to the archetype CMS
2. clear the cookie 'ys-componentPropertiesWindow' on localhost, if set (it stores the last position and size of the component properties window)
3. edit the only channel
4. drag a 'List' component into the home page
5. click the 'List' component to open the component properties window
6. resize the component properties window of the List component so its height becomes very small
7. drag the window down as far as possible, so its bottom touches the bottom bar of the CMS
8. close the window
9. click the 'List' component again to open the component properties window

Expected: the component properties window opens in the previous position and becomes as high as possible in the visible area. Dragging the window up does not change its size.
Actual: the component properties window opens in the previous position and grows outside the visible area. Dragging the window up suddenly make it jump to the top and show its full contents.