disabled btn-link button has a different style on hover

Created by: kosl90

• Operating system and version : Windows 7
• Browser and version : Google Chrome 55.0.2883.87 m (64-bit)
• Reduced test cases and potential fixes using JS Bin https://jsbin.com/yetixexohi/edit?html,output

potential fixes with:

.btn-link:disabled { color: #818a91; text-decoration: none; }