MOBILE-3448 File system: File name is not unique when uploading

Author: toanlam

src/providers/file.ts

@@ -1158,7 +1158,7 @@ export class CoreFileProvider {
                 do {
                     newName = fileNameWithoutExtension + '(' + num + ')' + extension;
                     num++;
-                } while (typeof files[newName] != 'undefined');
+                } while (typeof files[newName.toLowerCase()] != 'undefined');
 
                 // Ask the user what he wants to do.
                 return newName;