fix(macos): Remove keypress handler in the webview for copy/paste/cut

[lemarier]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Documentation
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes. Issue #___
• No

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix: #xxx[,#xxx], where "xxx" is the issue number)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

It should be handled by the menu.
It prevents showing a popup when we do cmd+v

[wusyong]

but is it able to cmd+x/c/v in the webview without menu items?

[lemarier]

but is it able to cmd+x/c/v in the webview without menu items?

Nop! But if we follow macOS guidelines it SHOULD be handled trough the menus.

Also, the user still have the possibility to add the javascript if needed (by example, running in kiosk mode).

Edit; Also we now expose the clipboard API who can do a better job (paste without popup)