Require Qt4 >=4.8.0; remove some ifdefs on qt version

CMakeLists.txt

@@ -76,7 +76,7 @@ FIND_PACKAGE(Qt5Widgets)
 IF(Qt5Widgets_FOUND)
     MESSAGE(STATUS "Found Qt ${Qt5Widgets_VERSION_STRING}")
 ELSE()
-    FIND_PACKAGE(Qt4 REQUIRED)
+    FIND_PACKAGE(Qt4 4.8.0 REQUIRED)
     IF(Qt4_FOUND)
         MESSAGE(STATUS "Found Qt ${QT_VERSION_MAJOR}.${QT_VERSION_MINOR}.${QT_VERSION_PATCH}")
     ELSE()

cockatrice/src/carddatabasemodel.cpp

@@ -68,9 +68,7 @@ QVariant CardDatabaseModel::headerData(int section, Qt::Orientation orientation,
 
 void CardDatabaseModel::updateCardList()
 {
-#if QT_VERSION >= 0x050000
     beginResetModel();
-#endif
 
     for (int i = 0; i < cardList.size(); ++i)
         disconnect(cardList[i], 0, this, 0);
@@ -79,11 +77,7 @@ void CardDatabaseModel::updateCardList()
     for (int i = 0; i < cardList.size(); ++i)
         connect(cardList[i], SIGNAL(cardInfoChanged(CardInfo *)), this, SLOT(cardInfoChanged(CardInfo *)));
     
-#if QT_VERSION < 0x050000
-    reset();
-#else
     endResetModel();
-#endif
 }
 
 void CardDatabaseModel::cardInfoChanged(CardInfo *card)

cockatrice/src/decklistmodel.cpp

@@ -30,9 +30,7 @@ DeckListModel::~DeckListModel()
 
 void DeckListModel::rebuildTree()
 {
-#if QT_VERSION >= 0x050000
     beginResetModel();
-#endif
 
     root->clearTree();
     InnerDecklistNode *listRoot = deckList->getRoot();
@@ -59,11 +57,7 @@ void DeckListModel::rebuildTree()
         }
     }
 
-#if QT_VERSION < 0x050000
-    reset();
-#else
     endResetModel();
-#endif
 }
 
 int DeckListModel::rowCount(const QModelIndex &parent) const

cockatrice/src/remotedecklist_treewidget.cpp

@@ -258,17 +258,11 @@ void RemoteDeckList_TreeModel::deckListFinished(const Response &r)
 {
     const Response_DeckList &resp = r.GetExtension(Response_DeckList::ext);
 
-#if QT_VERSION >= 0x050000
     beginResetModel();
-#endif
 
     root->clearTree();
 
-#if QT_VERSION < 0x050000
-    reset();
-#else
     endResetModel();
-#endif
     
     ServerInfo_DeckStorage_TreeItem tempRoot;
     tempRoot.set_id(0);