[Start] Gui: enable precompiled headers

- also some whitespace changes

src/Mod/Start/App/CMakeLists.txt

@@ -16,12 +16,9 @@ SET(Start_SRCS
     StartConfiguration.h
 )
 
-
-
 add_library(Start SHARED ${Start_SRCS})
 target_link_libraries(Start ${Start_LIBS})
 
-
 SET_BIN_DIR(Start Start /Mod/Start)
 SET_PYTHON_PREFIX_SUFFIX(Start)
 

src/Mod/Start/App/PreCompiled.cpp

@@ -20,5 +20,4 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h"

src/Mod/Start/Gui/CMakeLists.txt

@@ -36,6 +36,12 @@ SET(StartGuiIcon_SVG
     Resources/icons/StartWorkbench.svg
 )
 
+if(FREECAD_USE_PCH)
+    add_definitions(-D_PreComp_)
+    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" PCH_SRCS ${StartGui_SRCS})
+    ADD_MSVC_PRECOMPILED_HEADER(StartGui PreCompiled.h PreCompiled.cpp PCH_SRCS)
+endif(FREECAD_USE_PCH)
+
 add_library(StartGui SHARED ${StartGui_SRCS} ${StartGuiIcon_SVG})
 target_link_libraries(StartGui ${StartGui_LIBS})
 

src/Mod/Start/Gui/PreCompiled.cpp

@@ -20,5 +20,4 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h"

src/Mod/Start/Gui/Workbench.cpp

@@ -21,7 +21,6 @@
  ***************************************************************************/
 
 #include "PreCompiled.h"
-
 #ifndef _PreComp_
 # include <QCoreApplication>
 #endif