Fix issue #9011 - eliminate unnecessary uses of CPACK_PACKAGE_INSTALL_DIRECTORY.

Replace them with CPACK_PACKAGE_NAME. The registry keys involved in this commit are used by Windows to track things in the Add/Remove programs portion of the Control Panel. With '\' characters in the keyname, the calls do not do what they are intended to do and the installed program never shows up in the control panel view. (Details noted in the issue itself.) Thanks to 'killerfox' for the patch.

Modules/NSIS.template.in

@@ -74,7 +74,7 @@ Var AR_RegFlags
    
   ClearErrors
   ;Reading component status from registry
-  ReadRegDWORD $AR_RegFlags HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@\Components\${SecName}" "Installed"
+  ReadRegDWORD $AR_RegFlags HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@\Components\${SecName}" "Installed"
   IfErrors "default_${SecName}"
     ;Status will stay default if registry value not found
     ;(component was never installed)
@@ -107,13 +107,13 @@ Var AR_RegFlags
     ;Section is not selected:
     ;Calling Section uninstall macro and writing zero installed flag
     !insertmacro "Remove_${${SecName}}"
-    WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@\Components\${SecName}" \
+    WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@\Components\${SecName}" \
   "Installed" 0
     Goto "exit_${SecName}"
  
  "leave_${SecName}:"
     ;Section is selected:
-    WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@\Components\${SecName}" \
+    WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@\Components\${SecName}" \
   "Installed" 1
  
  "exit_${SecName}:"
@@ -484,7 +484,7 @@ Function ConditionalAddToRegisty
   Pop $0
   Pop $1
   StrCmp "$0" "" ConditionalAddToRegisty_EmptyString
-    WriteRegStr SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@" \
+    WriteRegStr SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@" \
     "$1" "$0"
     ;MessageBox MB_OK "Set Registry: '$1' to '$0'"
     DetailPrint "Set install registry entry: '$1' to '$0'"
@@ -794,17 +794,17 @@ FunctionEnd
 
 Section "Uninstall"
   ReadRegStr $START_MENU SHCTX \
-   "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@" "StartMenu"
+   "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@" "StartMenu"
   ;MessageBox MB_OK "Start menu is in: $START_MENU"
   ReadRegStr $DO_NOT_ADD_TO_PATH SHCTX \
-    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@" "DoNotAddToPath"
+    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@" "DoNotAddToPath"
   ReadRegStr $ADD_TO_PATH_ALL_USERS SHCTX \
-    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@" "AddToPathAllUsers"
+    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@" "AddToPathAllUsers"
   ReadRegStr $ADD_TO_PATH_CURRENT_USER SHCTX \
-    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@" "AddToPathCurrentUser"
+    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@" "AddToPathCurrentUser"
   ;MessageBox MB_OK "Add to path: $DO_NOT_ADD_TO_PATH all users: $ADD_TO_PATH_ALL_USERS"
   ReadRegStr $INSTALL_DESKTOP SHCTX \
-    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@" "InstallToDesktop"
+    "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@" "InstallToDesktop"
   ;MessageBox MB_OK "Install to desktop: $INSTALL_DESKTOP "
 
 @CPACK_NSIS_EXTRA_UNINSTALL_COMMANDS@
@@ -821,7 +821,7 @@ Section "Uninstall"
 
   ;Remove the uninstaller itself.
   Delete "$INSTDIR\Uninstall.exe"
-  DeleteRegKey SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_INSTALL_DIRECTORY@"
+  DeleteRegKey SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\@CPACK_PACKAGE_NAME@"
 
   ;Remove the installation directory if it is empty.
   RMDir "$INSTDIR"