Add grid validation to the log QSO dialog

This also has the desirable  attribute of enforcing the canonical case
for grid characters i.e. AA99bb.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8625 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

logqso.cpp

@@ -11,6 +11,7 @@
 #include "MessageBox.hpp"
 #include "Configuration.hpp"
 #include "Bands.hpp"
+#include "MaidenheadLocatorValidator.hpp"
 
 #include "ui_logqso.h"
 #include "moc_logqso.cpp"
@@ -25,6 +26,7 @@ LogQSO::LogQSO(QString const& programTitle, QSettings * settings
   ui->setupUi(this);
   setWindowTitle(programTitle + " - Log QSO");
   loadSettings ();
+  ui->grid->setValidator (new MaidenheadLocatorValidator {this});
 }
 
 LogQSO::~LogQSO ()