Add additional bindings for navigating suggestions that don't confuse NVDA (#3787)

src/vs/editor/contrib/suggest/browser/suggest.ts

@@ -241,19 +241,19 @@ CommonEditorRegistry.registerEditorCommand('hideSuggestWidget', weight, { primar
 	const controller = SuggestController.getSuggestController(editor);
 	controller.cancelSuggestWidget();
 });
-CommonEditorRegistry.registerEditorCommand('selectNextSuggestion', weight, { primary: KeyCode.DownArrow }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
+CommonEditorRegistry.registerEditorCommand('selectNextSuggestion', weight, { primary: KeyCode.DownArrow, secondary: [ KeyMod.Alt | KeyCode.DownArrow ] }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
 	const controller = SuggestController.getSuggestController(editor);
 	controller.selectNextSuggestion();
 });
-CommonEditorRegistry.registerEditorCommand('selectNextPageSuggestion', weight, { primary: KeyCode.PageDown }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
+CommonEditorRegistry.registerEditorCommand('selectNextPageSuggestion', weight, { primary: KeyCode.PageDown, secondary: [ KeyMod.Alt | KeyCode.PageDown ] }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
 	const controller = SuggestController.getSuggestController(editor);
 	controller.selectNextPageSuggestion();
 });
-CommonEditorRegistry.registerEditorCommand('selectPrevSuggestion', weight, { primary: KeyCode.UpArrow }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
+CommonEditorRegistry.registerEditorCommand('selectPrevSuggestion', weight, { primary: KeyCode.UpArrow, secondary: [ KeyMod.Alt | KeyCode.UpArrow ] }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
 	const controller = SuggestController.getSuggestController(editor);
 	controller.selectPrevSuggestion();
 });
-CommonEditorRegistry.registerEditorCommand('selectPrevPageSuggestion', weight, { primary: KeyCode.PageUp }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
+CommonEditorRegistry.registerEditorCommand('selectPrevPageSuggestion', weight, { primary: KeyCode.PageUp, secondary: [ KeyMod.Alt | KeyCode.PageUp ] }, true, CONTEXT_SUGGEST_WIDGET_VISIBLE, (ctx, editor, args) => {
 	const controller = SuggestController.getSuggestController(editor);
 	controller.selectPrevPageSuggestion();
 });