Formatting shortcuts always active without selected text

[montlebalm]

Quill does not block formatting keyboard shortcuts -- like ⌘+b -- when there's no selected text. It works correctly when text is selected.

Steps for Reproduction

1. Visit https://jsfiddle.net/montlebalm/zgk7qkrp/2/
2. Focus the Quill editor and hit ⌘+b
3. Type "foo"
4. Verify "foo" is bold

Expected behavior:

Formatting shortcuts should not be allowed in any context if the corresponding formats are disabled.

Actual behavior:

Formatting shortcuts are active when there's no selected text.

Platforms:

Tested in Chrome 55, Safari 10 on macOS.

Version:

Version 1.1.3