[ios] Fix opening websites with percent encoding characters

Signed-off-by: Alexander Borsuk <me@alex.bio>

iphone/Maps/Categories/UIKitCategories.m

@@ -180,6 +180,11 @@
 }
 
 - (BOOL)openUrl:(NSString *)urlString externally:(BOOL)externally skipEncoding:(BOOL)skipEncoding
+{
+  NSString * encoded;
+  if (skipEncoding) {
+    encoded = urlString;
+  } else if (![urlString canBeConvertedToEncoding:NSASCIIStringEncoding])
   {
     // TODO: This is a temporary workaround to open cyrillic/non-ASCII URLs.
     // URLs in OSM are stored in UTF-8. NSURL constructor documentation says:
@@ -188,10 +193,6 @@
     // 1. Split the (non-ASCII) string into components (host, path, query, fragment, etc.)
     // 2. Encode each component separately (they have different allowed characters).
     // 3. Merge them back into the string and create NSURL.
-  NSString * encoded;
-  if (skipEncoding) {
-    encoded = urlString;
-  } else {
     NSMutableCharacterSet * charset = [[NSMutableCharacterSet alloc] init];
     [charset formUnionWithCharacterSet:NSCharacterSet.URLHostAllowedCharacterSet];
     [charset formUnionWithCharacterSet:NSCharacterSet.URLPathAllowedCharacterSet];