src/vs/workbench/contrib/search/browser/searchView.ts/SearchView/onFocus
class SearchView:	private onFocus(lineMatch: Match, preserveFocus?: boolean, sideBySide?: boolean, pinned?: boolean): Promise<any> {
		const useReplacePreview = this.configurationService.getValue<ISearchConfiguration>().search.useReplacePreview;
		return (useReplacePreview && this.viewModel.isReplaceActive() && !!this.viewModel.replaceString) ?
			this.replaceService.openReplacePreview(lineMatch, preserveFocus, sideBySide, pinned) :
			this.open(lineMatch, preserveFocus, sideBySide, pinned);
	}