Defines from which position the search should be executed.
'selection'
'previous-match'
'auto'
'selection-start'
'start'
Defines from which position the search should be executed.
'selection'- search from selection head/anchor (depending on search direction)'previous-match'- search from previous match'auto'- search from selection if editor is focused or previous match otherwise'selection-start'- search from selection head/anchor whichever is smaller'start'- from start of the editor