Change ToggleHiddenEventVisibility & GoToHome KeyBindingActions (#29374)

The current keyboard shortcuts for GoToHome and ToggleHiddenEventVisibility are:

|                             	| other        	| macOS        	|
|-----------------------------	|--------------	|--------------	|
| GoToHome                    	| Ctrl–Alt–H   	| Ctrl–Shift–H 	|
| ToggleHiddenEventVisibility 	| Ctrl–Shift–H 	| Cmd–Shift–H  	|

This removes both distinctions for macOS in order ToggleHiddenEventVisibility not to conflict with...
1. the built-in Safari keyboard shortcut for opening the Home page (Cmd–Shift–H)
2. the KeyBindingAction for GoToHome.

Co-authored-by: Florian Duros <florianduros@element.io>

src/accessibility/KeyboardShortcuts.ts

@@ -521,8 +521,7 @@ export const KEYBOARD_SHORTCUTS: IKeyboardShortcuts = {
     [KeyBindingAction.GoToHome]: {
         default: {
             ctrlKey: true,
-            altKey: !IS_MAC,
-            shiftKey: IS_MAC,
+            altKey: true,
             key: Key.H,
         },
         displayName: _td("keyboard|go_home_view"),
@@ -585,7 +584,7 @@ export const KEYBOARD_SHORTCUTS: IKeyboardShortcuts = {
     },
     [KeyBindingAction.ToggleHiddenEventVisibility]: {
         default: {
-            ctrlOrCmdKey: true,
+            ctrlKey: true,
             shiftKey: true,
             key: Key.H,
         },