find: do not always include current line for find in selection

fixes #12820

src/vs/editor/contrib/find/browser/findWidget.ts

@@ -145,6 +145,9 @@ export class FindWidget extends Widget implements IOverlayWidget {
 		this._focusTracker.addFocusListener(() => {
 			this._findInputFocussed.set(true);
 			let selection = this._codeEditor.getSelection();
+			if (selection.endColumn === 1) {
+				selection = selection.setEndPosition(selection.endLineNumber - 1, 1);
+			}
 			let currentMatch = this._state.currentMatch;
 			if (selection.startLineNumber !== selection.endLineNumber) {
 				if (!Range.equalsRange(selection, currentMatch)) {
@@ -501,6 +504,9 @@ export class FindWidget extends Widget implements IOverlayWidget {
 			onChange: () => {
 				if (this._toggleSelectionFind.checked) {
 					let selection = this._codeEditor.getSelection();
+					if (selection.endColumn === 1) {
+						selection = selection.setEndPosition(selection.endLineNumber - 1, 1);
+					}
 					if (!selection.isEmpty()) {
 						this._state.change({ searchScope: selection }, true);
 					}