Fix CSS files rendering for branding folder

[mbalani]

Styles are not being rendered from ~/Branding/Content/ folder. It’s only getting rendered from ~/Content/ and it’s subfolders.

In AppActivator.cs code file, StyleBundle includes files from ~/Content/ and ~/Branding/Content/ as follows:

Bundle stylesBundle = new StyleBundle("~/Content/css");
            foreach (string filename in new[] {
                    "Site.css",
                    "Layout.css",
                    "PageStylings.css",
                    "fabric.css",
                })
            {
                stylesBundle
                    .Include("~/Content/" + filename)
                    .Include("~/Branding/Content/" + filename);
            }

But styles/.css files that I added under ~/Branding/Content/ folder is not being rendered at all. That defeats the purpose of having this folder.
After trial/error and some reading, I found out following article that mentions same StyleBundle won’t work for different directories (root directories), like Content and Branding in this case.
https://stackoverflow.com/questions/30120357/bundling-files-in-different-directories
So I added another include statement to add ~/Content/Branding/ folder without removing ~/Branding/Content/.
In my opinion, include statement of ~/Branding/Content/ should be deleted because it’s not providing any value if it’s not rendering files from that folder. But I left it there for NuGet team to decide.

P.S.: I tried having two StyleBundles one with Content folder and other StyleBundle with \Branding\Content folder, but couldn't use different StyleBundles on the same page.

[joelverhagen]

Yeah, I think it's fine that we leave ~/Content/Branding/.