[Themes][RTL] Use correct icons for tabbar scroll buttons.

- also fixed compile issue on Windows.

bin/themes/chrome/rtl.css

@@ -7,3 +7,13 @@
 {
     qproperty-multiIcon: url(images/navigation-forward.png);
 }
+
+#tabbar-button-right
+{
+    qproperty-icon: url(images/tab-left-arrow.png);
+}
+
+#tabbar-button-left
+{
+    qproperty-icon: url(images/tab-right-arrow.png);
+}

bin/themes/default/rtl.css

@@ -7,3 +7,13 @@
 {
     qproperty-icon: url(images/navigation-forward.png);
 }
+
+#tabbar-button-right
+{
+    qproperty-icon: url(images/tab-left-arrow.png);
+}
+
+#tabbar-button-left
+{
+    qproperty-icon: url(images/tab-right-arrow.png);
+}

bin/themes/linux/rtl.css

@@ -10,3 +10,12 @@
     qproperty-fallbackIcon: url(images/go-next.png);
 }
 
+#tabbar-button-right
+{
+    qproperty-icon: url(images/tab-left-arrow.png);
+}
+
+#tabbar-button-left
+{
+    qproperty-icon: url(images/tab-right-arrow.png);
+}

bin/themes/mac/rtl.css

@@ -12,3 +12,13 @@
 {
     qproperty-multiIcon: url(images/tabs-list-button_rtl.png);
 }
+
+#tabbar-button-right
+{
+    qproperty-icon: url(images/tab-left-arrow.png);
+}
+
+#tabbar-button-left
+{
+    qproperty-icon: url(images/tab-right-arrow.png);
+}

bin/themes/windows/rtl.css

@@ -17,3 +17,13 @@
 {
     margin-left: 1px;
 }
+
+#tabbar-button-right
+{
+    qproperty-icon: url(images/tab-left-arrow.png);
+}
+
+#tabbar-button-left
+{
+    qproperty-icon: url(images/tab-right-arrow.png);
+}

src/lib/app/mainapplication.cpp

@@ -198,7 +198,7 @@ MainApplication::MainApplication(int &argc, char** argv)
     else {
 #if defined(Q_OS_WIN) || defined(Q_OS_OS2)
         // Use %APPDATA%/qupzilla as PROFILEDIR on Windows
-#if QT_VERSION >= 0x050000
+#if QT_VERSION < 0x050000
         QString dataLocation = QDesktopServices::storageLocation(QDesktopServices::DataLocation);
 #else
         QString dataLocation = QStandardPaths::writableLocation(QStandardPaths::DataLocation);