UI: Fix enableShortcuts option

[atanasster]

Issue: #6569

What I did

if options.enableShortcuts is set to false:

• remove the display of the shortcuts next to the menu items
• disable handling of shortcut activities

tried to disturb the existing code as little as possible.

How to test

Please review if indeed all the features should be disabled in shortcuts.ts after the line switch (feature) {

in official storybook, change the

addParameters({
  options: {
    ...
    enableShortcuts: false,
  },
});

NB the options seem to take some time until the local storage expires, so you might have to delete the local storage @storybook/ui/store

[vercel]

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[shilman]

Beautiful!