Updated qwt6 finder and max qt version warning

cmake/CMakeLists.txt

@@ -79,7 +79,7 @@ if (NOT QT5_FOUND)
   message(FATAL_ERROR "Could not found any QT Version. Please specify QT5_INSTALL_PATH (path to bin and include dir) to build with QT5")
 endif()
 
-set (OF_MAX_QT_VERSION "5.6.0")
+set (OF_MAX_QT_VERSION "5.9.0")
 
 if (${Qt5Core_VERSION_STRING} STRGREATER ${OF_MAX_QT_VERSION})
   message(WARNING "Detected QT Version higher than ${OF_MAX_QT_VERSION}!\n" "OpenFlipper has not been tested with this QT Version.")

cmake/FindQwt6.cmake

@@ -28,10 +28,14 @@ elseif ( CMAKE_GENERATOR MATCHES "^Visual Studio 14.*" )
 endif()
 
 if (QT5_FOUND)
-    if (${Qt5Core_VERSION_STRING} VERSION_EQUAL "5.8.0" OR ${Qt5Core_VERSION_STRING} VERSION_GREATER "5.5.1")
+    if (${Qt5Core_VERSION_STRING} VERSION_EQUAL "5.9.0" )
+       SET(ACG_SEARCH_PATH "/ACG/acgdev/gcc-x86_64/qwt-6.1.3-qt5.9.0")
+    else()                 
+      if (${Qt5Core_VERSION_STRING} VERSION_EQUAL "5.8.0" OR ${Qt5Core_VERSION_STRING} VERSION_GREATER "5.5.1")
         SET(ACG_SEARCH_PATH "/ACG/acgdev/gcc-x86_64/qwt-6.1.3-qt5.8.0")
-    else()
+      else()
         SET(ACG_SEARCH_PATH "/ACG/acgdev/gcc-4.9-x86_64/qwt-6.1-qt5")
+      endif()
     endif()
 else()
     SET(ACG_SEARCH_PATH "/usr/local/qwt/")
@@ -110,13 +114,14 @@ if (QWT6_VERSION_FOUND)
       )
 # MACOS and LINUX
   else()
-    find_library(QWT6_LIBRARY NAMES qwt-qt5
+    find_library(QWT6_LIBRARY NAMES qwt qwt-qt5
       PATHS
       "${ACG_SEARCH_PATH}/lib"
+      NO_DEFAULT_PATH
       NO_CMAKE_PATH
       NO_CMAKE_ENVIRONMENT_PATH
       )
-  
+ 
     if (NOT QWT6_LIBRARY) # if not the specific acg qwt installation was found, try system wide
       find_library(QWT6_LIBRARY NAMES qwt
         PATHS