fix: Fix Table disabled state + Safari loadMore and scroll Combobox selected item into view when opening via click (#8224)
* Fix select all checkbox disabled state and other empty state issues when loading sentinel is provided
* update table loading sentinel styles for non-virtualized tables in Safari
position absolute/relative is not really well supported in Safari making the loading sentinel not scroll into view when scrolling the table
* fix tests
* test scrolling the selected item into view when opening the dropdown via trigger click
* forgot to skip some others
* make loader not sticky, follow S1 design
* updating combobox tests to fit new behavior
* review comments
* Revert "make loader not sticky, follow S1 design"
This reverts commit a4f12d85458a32f9d605f5c1bce373c437fbe510.