WIP Introduce combobox for <select> with more options than COMBOBOX_MIN_LIMIT
Fix the selenium tests to work with the new comboboxes... and change the limit to 50 list options before the combobox is used
Merge pull request #482 from hudmol/48217179-comboboxes-for-enumerations

[Delivers #48217179] comboboxes for biiiig enumerations