ComboBox with item filtering and a selected item will not open the popup to display the currently selected item

[thevaadinman]

This issue was previously considered fixed, but had to be reverted due to unforeseen side effects.

The effect is as follows:

• There is a ComboBox with a large amount of items.
• A value is chosen from the ComboBox by typing in part of the desired item name, and the item is selected by clicking on it in the dropdown menu
• The popup closes upon selection
• The user manually opens the ComboBox dropdown
• The dropdown should be scrolled to a position in the list which shows the currently selected item. Instead, the first page of results is shown.
• If the dropdown is dismissed and opened again, the ComboBox will have scrolled to the correct position in the list.

This is due to the internal state of the ComboBox client-side widget getting confused regarding the tracking of the current page.