With shortcuts initialization

### Short description

I tried to select whole article with shortcut cmd a, but shortcuts are not even initialized

### Actual behaviour

create shortcut on not only rendered articles, but for all note class initialization

### Steps to reproduce

1. Create a new Note
2. Click on [...]
3. [...]

### On which platforms did you notice this

This issue annoys me on [macOS 10.13].

### App version

I use CodeX Notes [v1.0].

### Image

Add any image that might be helpful to understand the problem.