Tabs: Add support for setOption with classes
Tooltip: Add support for setOption with classes
Accordion: Update classes option to use empty string instead of null
Autocomplete: Update classes option to use empty string instead of null
Button: Update classes option to use empty string instead of null
Dialog: Update classes option to use empty string instead of null
Menu: Update classes option to use empty string instead of null
Progressbar: Update classes option to use empty string instead of null
Slider: Update classes option to use empty string instead of null
Spinner: Update classes option to use empty string instead of null
Tabs: Update classes option to use empty string instead of null
Tooltip: Update classes option to use empty string instead of null
Split: fix errors and update elementsFromClassKey implementation