Major signs bug... text not visible when entering...unable to enter past 1st line.

**see title for summary** **bug is actually in 0.8.0 official release.**

What I expected to happen was...:
When entering text on signs, you should see what you are entering, and you should be able to hit enter to type on multiple lines.

What actually happened was...:
When I place a sign, the keyboard pops up, and when I type, the text I am entering is not visible. When I try to type on multiple lines, only the first line saves.when I exit the sign's GUI , only the first line I have typed is visible.

Steps to Reproduce:
1. Place a sign.
2. Observe the following bugs.
3. ...