Support back and forward keys in default shortcuts (microsoft#237701)

Support back  and forward keys in default shortcuts

These keys can be found on certain keyboards, and on custom layouts like [Extend](https://dreymar.colemak.org/layers-extend.html).

Author: Jules-Bertholet

src/vs/workbench/browser/parts/editor/editorActions.ts

@@ -1420,9 +1420,9 @@ export class NavigateForwardAction extends Action2 {
 			precondition: ContextKeyExpr.has('canNavigateForward'),
 			keybinding: {
 				weight: KeybindingWeight.WorkbenchContrib,
-				win: { primary: KeyMod.Alt | KeyCode.RightArrow },
-				mac: { primary: KeyMod.WinCtrl | KeyMod.Shift | KeyCode.Minus },
-				linux: { primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.Minus }
+				win: { primary: KeyMod.Alt | KeyCode.RightArrow, secondary: [KeyCode.BrowserForward] },
+				mac: { primary: KeyMod.WinCtrl | KeyMod.Shift | KeyCode.Minus, secondary: [KeyCode.BrowserForward] },
+				linux: { primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.Minus, secondary: [KeyCode.BrowserForward] }
 			},
 			menu: [
 				{ id: MenuId.MenubarGoMenu, group: '1_history_nav', order: 2 },
@@ -1455,9 +1455,9 @@ export class NavigateBackwardsAction extends Action2 {
 			icon: Codicon.arrowLeft,
 			keybinding: {
 				weight: KeybindingWeight.WorkbenchContrib,
-				win: { primary: KeyMod.Alt | KeyCode.LeftArrow },
-				mac: { primary: KeyMod.WinCtrl | KeyCode.Minus },
-				linux: { primary: KeyMod.CtrlCmd | KeyMod.Alt | KeyCode.Minus }
+				win: { primary: KeyMod.Alt | KeyCode.LeftArrow, secondary: [KeyCode.BrowserBack] },
+				mac: { primary: KeyMod.WinCtrl | KeyCode.Minus, secondary: [KeyCode.BrowserBack] },
+				linux: { primary: KeyMod.CtrlCmd | KeyMod.Alt | KeyCode.Minus, secondary: [KeyCode.BrowserBack] }
 			},
 			menu: [
 				{ id: MenuId.MenubarGoMenu, group: '1_history_nav', order: 1 },