title: How to set specific char as group separator in QLocale?
body: <p>Each locale in Qt have different symbols used as group separator ( ',', '.' or 0xa0 for example).</p>
  
  <p>Is it possible somehow for Qt application to use all settings for current locale and override char used as group separator? So it will be automatically used by all default implementations of validators and "toString" methods.</p>
  
  <p>PS: by current locale I mean locale obtained by QLocale::system(), and replaced by QLocale::setDefault(locale)</p>
  
  <p>Edit on duplicate suggestion:
  I need not just replace group and decimal separators for double->string conversion, but backward as well. So user could input double value in different edit widgets with suggested symbols and default Qt implementation will accept it ( for example Q*Validator and QDoubleSpinBox use system locale to validate input, and if there will be non-default characters - input will be rejected).</p>