Fix another issue with station details not being saved

Due to  what appears to be  a Qt bug, any  in progress user edit  to a
table  fields is  not  updated  in the  underlying  data models  until
QDialog::accept() is  called, this means that  model validation before
calling QDialog::accept() is tricky.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5164 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

FrequencyList.cpp

@@ -58,7 +58,6 @@ FrequencyList::FrequencyList (Frequencies frequencies, QObject * parent)
   : QSortFilterProxyModel {parent}
   , m_ {frequencies, parent}
 {
-  // setDynamicSortFilter (true);
   setSourceModel (&*m_);
   setSortRole (SortRole);
 }
@@ -73,9 +72,8 @@ FrequencyList& FrequencyList::operator = (Frequencies frequencies)
   return *this;
 }
 
-auto FrequencyList::frequencies () -> Frequencies
+auto FrequencyList::frequencies () const -> Frequencies
 {
-  submit ();
   return m_->frequencies ();
 }