Triple click selects next block as well as current block

[dburrows]

Bug present in OS X, Chrome 48 & Safari 9.0.3 - not present in Firefox 41.0.1
![draft js rich text editor framework for react]

Replication Steps

Using the demo editor on frontpage of the Draft website

• enter 4 lines of text
• triple click on second line
• click H1 to turn this block into a H1 block
• both second and third block will be converted to H1

Expected: only second block should be converted to H1

[hellendag]

Same as #86 :)

[hellendag]

Awesome detailed bug report, btw. Thanks.

[dburrows]

No problem, sorry about the duplicate, will search properly next time ;)