Convert from CSS to SCSS. Make a multitude of refinements to styling along the way.

Remove unused glade UI file. Added CSS classes to various components. Fix some alignment issues. Renamed our albums_strip to favorites_list.

Implement recursive file parsing in KotoIndexedAlbum with the intent of using it for "discs" / CD, useful for albums like Foo Fighters: In Your Honor that have 2 or more CDs. Still need to work on refining this further.

Add stub function in our album view for a planned separation of the track listing so we can do it based on discs and other depth-of-3 sub-folders.

theme/_primary-nav.scss

@@ -0,0 +1,21 @@
+.primary-nav {
+	padding: 10px;
+
+	& > viewport > box {
+		& > .koto-botton {
+			& > box {
+				padding: 10px 0;
+
+				& > label {
+					font-size: large;
+				}
+			}
+		}
+
+		& > .expander {
+			& > .expander-header {
+				margin-bottom: 10px;
+			}
+		}
+	}
+}