Double click popup colors are wrong #1616

Describe the bug
When you double click text, you get the link and edit buttons. However, the background colors are missing and the URL icon is a different color from the pencil icon.

Steps To Reproduce
Steps to reproduce the behavior:

1. Go to https://demo.bookstackapp.com/books/lorem-ipsum-dolor/page/my-lorem-ipsum-book
2. Double click on a piece fo text
3. See screenshot

Expected behavior
The background colors should match the Application Primary Color in settings

Screenshots

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): 0.27
• PHP Version: 7.0
• Hosting Method (Nginx/Apache/Docker): Nginx