Issue Overview

If I’m using Gutenberg at a small width, I can’t add a block using the pop-up. I have to enlarge the window of my browser to have access to the interface and select a block.

When I click on the « plus » button, the pop-up appears partially on the left side and at the top or the bottom of the page, repeatedly.

Steps to Reproduce (for bugs)

1. Reduce window of the browser to 780 px or less ;
2. Click the plus button to add a block
3. You should not be able to access the whole interface.

I’m using latest stable versions of Gutenberg (0.9) installed on WordPress (4.8.1) and used in Safari (10.1.2) on macOS Sierra (10.12.6).

Expected Behavior

I should be able to select and add a block for every window size.

Current Behavior

I have to enlarge the window to gain access to block selection.