Shows source/category icon next to BrowseViewController’s title

Also tints all navigation bar buttons to match source/category tint color.

# Conflicts:
#	AltStore/Browse/BrowseViewController.swift

AltStoreCore/Types/StoreCategory.swift

@@ -57,6 +57,14 @@ public enum StoreCategory: String, CaseIterable
         }
     }
     
+    public var filledSymbolName: String {
+        switch self
+        {
+        case .utilities: return self.symbolName
+        default: return self.symbolName + ".fill"
+        }
+    }
+    
     public var tintColor: UIColor {
         switch self
         {