Some cleanup in App cmake files to make them smaller and more readable

src/OpenMesh/Apps/Decimating/DecimaterGui/CMakeLists.txt

@@ -7,9 +7,6 @@ include_directories (
   ${QT_INCLUDE_DIR}
 )
 
-
-set (targetName DecimaterGui)
-
 # source code directories
 set (directories 
   ../../QtViewer
@@ -30,14 +27,14 @@ set (sources
 acg_drop_templates (sources)
 
 if (WIN32)
-  acg_add_executable (${targetName} WIN32 ${sources} ${headers})
+  acg_add_executable (DecimaterGui WIN32 ${sources} ${headers})
   # link to qtmain library to get WinMain function for a non terminal app
-  target_link_libraries (${targetName} ${QT_QTMAIN_LIBRARY})
+  target_link_libraries (DecimaterGui ${QT_QTMAIN_LIBRARY})
 else ()
-  acg_add_executable (${targetName} ${sources} ${headers} ) 
+  acg_add_executable (DecimaterGui ${sources} ${headers} ) 
 endif ()
 
-target_link_libraries (${targetName}
+target_link_libraries (DecimaterGui
   OpenMeshCore
   OpenMeshTools
   ${QT_LIBRARIES}