Repair UUID of inconsistent history items.

Closes #130

src/core/Entry.cpp

@@ -372,7 +372,6 @@ const QList<Entry*>& Entry::historyItems() const
 void Entry::addHistoryItem(Entry* entry)
 {
     Q_ASSERT(!entry->parent());
-    Q_ASSERT(entry->uuid() == uuid());
 
     m_history.append(entry);
     Q_EMIT modified();

src/format/KeePass2XmlReader.cpp

@@ -778,6 +778,13 @@ Entry* KeePass2XmlReader::parseEntry(bool history)
     }
 
     Q_FOREACH (Entry* historyItem, historyItems) {
+        if (historyItem->uuid() != entry->uuid()) {
+            if (m_strictMode) {
+                raiseError("History element with different uuid");
+            } else {
+                historyItem->setUuid(entry->uuid());
+            }
+        }
         entry->addHistoryItem(historyItem);
     }