Fix #28432: Scrolling lists respond incorrectly if mouse is not moved

Copy hardmin for LISTROW and ROW buttons when updating button
from old block due to list item index is stored in this value.

source/blender/editors/interface/interface.c

@@ -678,6 +678,11 @@ static int ui_but_update_from_old_block(const bContext *C, uiBlock *block, uiBut
 					SWAP(void *, oldbut->func_argN, but->func_argN)
 				}
 				
+				/* copy hardmin for list rows to prevent 'sticking' highlight to mouse position
+				   when scrolling without moving mouse (see [#28432]) */
+				if(ELEM(oldbut->type, ROW, LISTROW))
+					oldbut->hardmax= but->hardmax;
+				
 				ui_but_update_linklines(block, oldbut, but);
 				
 				BLI_remlink(&block->buttons, but);