Fixed #232: history pane doesn't retain cleared state after restarting goldendict

history.cc

@@ -153,6 +153,7 @@ bool History::save()
 void History::clear()
 {
   items.clear();
+  dirty = true;
 
   emit itemsChanged();
 }

history.hh

@@ -59,7 +59,7 @@ public:
 
   /// Remove item with given index from list
   void removeItem( int index )
-  { items.removeAt( index ); emit itemsChanged(); }
+  { items.removeAt( index ); dirty = true; emit itemsChanged(); }
 
   /// Attempts saving history. Returns true if succeeded - false otherwise.
   /// Since history isn't really that valuable, failures can be ignored.