Fixing that the tests use the QApplication instead of the QCoreApplication

Author: KGergo88

tests/sources/test_main.cpp

@@ -21,7 +21,7 @@
 
 
 
-#include <QApplication>
+#include <QCoreApplication>
 
 #include <gtest/gtest.h>
 
@@ -30,7 +30,7 @@
 int main(int argc, char *argv[])
 {
     // This is needs to be instantiated to be able to use Qt methods in the tests
-    QApplication qApplication(argc, argv);
+    QCoreApplication qApplication(argc, argv);
 
     // Running all the unit tests
     ::testing::InitGoogleTest(&argc, argv);