I want to have a look on the following issue:
https://bugs.openjdk.org/browse/JDK-8209991
https://bugs.openjdk.org/browse/JDK-8087549
Currently, the ComboBox hides the popup when typing in space, even when it is editable.
This is unexpected and problematic when implementing something like suggestiosn based on the typed in text.
Since this is not mentioned in the UED (https://wiki.openjdk.org/display/OpenJFX/ComboBox+User+Experience+Documentation), this probably needs some discussion.
My idea would be to not handle SPACE (don't close the popup) when the combobox is editable.
-- Marius
