Unable to Flash Github Images in Debug Server

[MeanGr33n]

Summary: Unable to Flash GitHub Images in Debug Server
Description: From the main page, there is the option to select "GitHub" as an image uploading source. However, when selecting this mode of upload, there is no option to provide a link or browse files. There is simply an un-clickable button labeled "Flash".
Severity: Major
Suggestions: While it may make sense to not allow flashing images from GitHub in debug mode, at the very least it would be a good idea to notify the user in some way that this isn't allowed. Some users may find an un-clickable button to not be a strong enough of a hint. For example when clicking the "GitHub" button it might be good to have a pop-up alerting the user that this isn't allowed in debug mode.