CMake: remove superfluous indirection

src/libcalamaresui/CMakeLists.txt

@@ -1,6 +1,6 @@
-set( CALAMARESUI_LIBRARY_TARGET calamaresui )
+project( libcalamaresui CXX )
 
-list( APPEND ${CALAMARESUI_LIBRARY_TARGET}_SOURCES
+list( APPEND calamaresui_SOURCES
     modulesystem/CppJobModule.cpp
     modulesystem/Module.cpp
     modulesystem/ModuleManager.cpp
@@ -29,12 +29,12 @@ list( APPEND ${CALAMARESUI_LIBRARY_TARGET}_SOURCES
     ViewManager.cpp
 )
 
-list( APPEND ${CALAMARESUI_LIBRARY_TARGET}_UI
+list( APPEND calamaresui_UI
     utils/DebugWindow.ui
 )
 
 if( WITH_PYTHON )
-    list( APPEND ${CALAMARESUI_LIBRARY_TARGET}_SOURCES
+    list( APPEND calamaresui_SOURCES
         modulesystem/PythonJobModule.cpp
     )
 endif()
@@ -43,7 +43,7 @@ if( WITH_PYTHONQT )
     include_directories(${PYTHON_INCLUDE_DIRS})
     include_directories(${PYTHONQT_INCLUDE_DIR})
 
-    list( APPEND ${CALAMARESUI_LIBRARY_TARGET}_SOURCES
+    list( APPEND calamaresui_SOURCES
         modulesystem/PythonQtViewModule.cpp
         utils/PythonQtUtils.cpp
         viewpages/PythonQtJob.cpp
@@ -58,9 +58,9 @@ if( WITH_PYTHONQT )
     )
 endif()
 
-calamares_add_library( ${CALAMARESUI_LIBRARY_TARGET}
-    SOURCES ${${CALAMARESUI_LIBRARY_TARGET}_SOURCES}
-    UI ${${CALAMARESUI_LIBRARY_TARGET}_UI}
+calamares_add_library( calamaresui
+    SOURCES ${calamaresui_SOURCES}
+    UI ${calamaresui_UI}
     EXPORT_MACRO UIDLLEXPORT_PRO
     LINK_PRIVATE_LIBRARIES
         ${YAMLCPP_LIBRARY}