Fixes: Move qt version check to qtcreator.pro

RevBy:    con

qtcreator.pro

+#version check qt
+TOO_OLD_LIST=$$find(QT_VERSION, ^4\.[0-4])
+count(TOO_OLD_LIST, 1) {
+    message("Cannot build the Qt Creator with a Qt version that old:" $$QT_VERSION)
+    error("Use at least Qt 4.5.")
+}
+
+
 TEMPLATE  = subdirs
 CONFIG   += ordered
 

src/plugins/designer/designer.pro

@@ -6,11 +6,6 @@ include(../../../shared/designerintegrationv2/designerintegration.pri)
 include(cpp/cpp.pri)
 include(designer_dependencies.pri)
 
-# -- check the Qt version
-TOO_OLD_LIST=$$find(QT_VERSION, ^4\.[0-4])
-count(TOO_OLD_LIST, 1) {
-    error("Cannot build the designer plugin with a Qt version that old:" $$QT_VERSION)
-}
 # -- figure out shared dir location
 !exists($$[QT_INSTALL_HEADERS]/QtDesigner/private/qdesigner_integration_p.h) {
     QT_SOURCE_TREE=$$fromfile($$(QTDIR)/.qmake.cache,QT_SOURCE_TREE)