Can't select text within paragraph without selecting entire paragraph

[scottbuscemi]

Describe the bug
There isn't a way to select particular sentences in multiple paragraphs without selecting the entire paragraphs.

To Reproduce
Steps to reproduce the behavior:

1. Create two paragraphs that each have two sentences.
2. Select the second sentence in the paragraph, then begin to highlight the first sentence.

Expected behavior
You should be able to just select particular sentences within a paragraph. There may be the use case where you want to copy one paragraph and the start of a next and move it elsewhere - but Gutenberg forces you to select entire paragraphs if you start highlighting more than just paragraph.

Screenshots

Desktop (please complete the following information):

• OS: macOS
• Browser: Chrome

Additional context
Nightly build of Gutenberg.

[designsimply]

Thank you for testing Gutenberg at this stage! There is an open issue at #3629 discussing the same thing, so I am going to close this issue as a duplicate of that one.