Fill Headers support

Since version 1.0.6 you are able to get help filling some of headers values.
For now it's only Authorization header but I already working on support for others headers.
It's working like this:
When You click into header value field in some cases (where support is provided) You should see popup window with button to open new form dialog. When you fill form and accept new value header value should change to new value.

Here is an screenshot:
Activate fill support
The form