Win32: fix inclusion of manifest, to get back visual styles.

This commit fixes four issues:
  * Instead of WRITE,APPEND, resource.rc was generated using
    WRITE,WRITE, which erased #include <windows.h> and prevented
    any symbolic definitions (like RT_MANIFEST) from working.
    This silently included them using a string type instead,
    which did nothing.
  * WINVER is bumped to Win7, since that's what we target now.
  * Index of RT_MANIFEST is changed to 2, since that's what
    it has to be when ISOLATION_AWARE_ENABLED is defined.
  * Platform is not restricted to X86 in manifest, since there
    is no point in doing so.

CMakeLists.txt

@@ -228,7 +228,8 @@ if(WIN32)
         -D_CRT_SECURE_NO_DEPRECATE
         -D_CRT_SECURE_NO_WARNINGS
         -D_SCL_SECURE_NO_WARNINGS
-        -D_WIN32_WINNT=0x500
+        -DWINVER=0x0601
+        -D_WIN32_WINNT=0x0601
         -D_WIN32_IE=_WIN32_WINNT
         -DISOLATION_AWARE_ENABLED
         -DWIN32

res/CMakeLists.txt

@@ -6,8 +6,9 @@ if(WIN32)
                    ${CMAKE_CURRENT_BINARY_DIR}/win32/versioninfo.rc)
 
     set(rc_file ${CMAKE_CURRENT_BINARY_DIR}/resources.rc)
-    file(WRITE ${rc_file} "// Autogenerated; do not edit\n#include<windows.h>\n")
-    file(WRITE ${rc_file} "#include \"${CMAKE_CURRENT_BINARY_DIR}/win32/versioninfo.rc\"\n")
+    file(WRITE  ${rc_file} "// Autogenerated; do not edit\n")
+    file(APPEND ${rc_file} "#include <windows.h>\n")
+    file(APPEND ${rc_file} "#include \"${CMAKE_CURRENT_BINARY_DIR}/win32/versioninfo.rc\"\n")
 
     function(add_resource name)
         set(source ${CMAKE_CURRENT_SOURCE_DIR}/${name})
@@ -117,7 +118,7 @@ endfunction()
 # Second, register all resources.
 if(WIN32)
     add_resource(win32/icon.ico     4000 ICON)
-    add_resource(win32/manifest.xml APP_MANIFEST RT_MANIFEST)
+    add_resource(win32/manifest.xml 2    RT_MANIFEST)
 elseif(APPLE)
     add_iconset (cocoa/AppIcon.iconset)
     add_xib     (cocoa/MainMenu.xib)

res/win32/manifest.xml

@@ -2,7 +2,7 @@
 <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
 <assemblyIdentity
     version="1.0.0.0"
-    processorArchitecture="X86"
+    processorArchitecture="*"
     name="JonathanWesthues.3dCAD.SolveSpace"
     type="win32"
 />
@@ -18,7 +18,7 @@
             type="win32"
             name="Microsoft.Windows.Common-Controls"
             version="6.0.0.0"
-            processorArchitecture="X86"
+            processorArchitecture="*"
             publicKeyToken="6595b64144ccf1df"
             language="*"
         />