Removed duplicate cmake code

Prefer GLVND OpenGL

src/OpenMesh/Apps/CMakeLists.txt

@@ -37,6 +37,8 @@ if ( BUILD_APPS )
     endif()
 
 
+    set( OpenGL_GL_PREFERENCE GLVND)
+
     # find needed packages for gui applications
     find_package (OpenGL)
 
@@ -70,17 +72,12 @@ if ( BUILD_APPS )
 			    
 
       # Add ui apps as dependency before fixbundle 
-      if ( WIN32 AND NOT "${CMAKE_GENERATOR}" MATCHES "MinGW Makefiles")
+      # Required on Windows (NOTMINGW) and APPLE
+      if ( APPLE OR (WIN32 AND NOT "${CMAKE_GENERATOR}" MATCHES "MinGW Makefiles") )
 	# let bundle generation depend on all targets
 	add_dependencies (fixbundle DecimaterGui ProgViewer QtViewer SubdividerGui Synthesizer)
       endif()
     
-      # Add ui apps as dependency before fixbundle 
-      if ( APPLE)
-	# let bundle generation depend on all targets
-	add_dependencies (fixbundle DecimaterGui ProgViewer QtViewer SubdividerGui Synthesizer)
-      endif()
-
       if ( WIN32 )
 	    FILE(GLOB files_install_app_dlls "${CMAKE_BINARY_DIR}/Build/*.dll" )
 	    INSTALL(FILES ${files_install_app_dlls} DESTINATION . )