Windows,Qt5: Fixed compile issue.

- It fixes: error: C2308: concatenating mismatched strings Concatenating wide
- See: http://blog.qt.digia.com/blog/2014/06/13/qt-weekly-13-qstringliteral/

src/lib/app/mainapplication.cpp

@@ -118,8 +118,7 @@ MainApplication::MainApplication(int &argc, char** argv)
 
     // QSQLITE database plugin is required
     if (!QSqlDatabase::isDriverAvailable(QSL("QSQLITE"))) {
-        QMessageBox::critical(0, QSL("Error"), QSL("Qt SQLite database plugin is not available. "
-                                                   "Please install it and restart the application."));
+        QMessageBox::critical(0, QSL("Error"), QSL("Qt SQLite database plugin is not available. Please install it and restart the application."));
         m_isClosing = true;
         return;
     }

src/plugins/GreaseMonkey/gm_manager.cpp

@@ -226,8 +226,8 @@ void GM_Manager::frameLoadStart()
                 frame->evaluateJavaScript(m_bootstrap + script->script());
             }
             else {
-                const QString jscript = QString(QSL("window.addEventListener(\"DOMContentLoaded\","
-                                                "function(e) { \n%1\n }, true);")).arg(m_bootstrap + script->script());
+                const QString jscript = QString(QSL("window.addEventListener(\"DOMContentLoaded\",function(e) { \n%1\n }, true);"))
+                        .arg(m_bootstrap + script->script());
                 frame->evaluateJavaScript(jscript);
             }
         }