Implemented data filtering.

core/itablemodel.cpp

@@ -0,0 +1,18 @@
+#include "itablemodel.h"
+
+ITableModel::ITableModel(QObject *parent)
+    :QAbstractTableModel(parent)
+{
+
+}
+
+void ITableModel::filter(const QString &filter)
+{
+    handleFilter(filter);
+}
+
+void ITableModel::restore()
+{
+    handleRestore();
+}
+