improve readOnly option

[fonov]

I notified that keyboard is appeared on mobile device even readOnly is set true when user tap on editor.

Set EditorView.editable -> false disable appeared keyboard on tap or select

[josdejong]

Thanks Fonov for the fix!

I think the function updateReadOnly should also be adapted.

Thinking about this: probably we should remove the EditorState.readOnly and instead just use EditorView.editable?

[josdejong]

@fonov what do you think?

[josdejong]

I've tried out only using EditorView.editable, but then certain actions are still working, like Ctrl+V to paste something. So now I've defined both EditorView.editable and EditorState.readOnly.

[josdejong]

fixed now in v0.7.4, thanks again!