Prevent non-existent help handbook from populating the main handbook table of contents.

kbarcode/kbarcode-batch.desktop

@@ -3,7 +3,13 @@ Encoding=UTF-8
 Type=Application
 Exec=kbarcode --batch
 Icon=kbarcode.png
-DocPath=kbarcode/index.html
+# Restore the following key and remove this comment when a help handbook
+# is written. Disabling this key prevents populating the main handbook
+# table of contents with a non-existent document, which results in a
+# main handbook error message of
+# 'There is no documentation available for /xyz/index.html.'
+# Also disable this key when there exists only a useless template handbook.
+# DocPath=kbarcode/index.html
 Comment=Barcode and label printing tool (batch printing mode)
 Comment[de]=Werkzeug zum Barcode und Etiketten Druck (Stapelverarbeitung)
 Terminal=false

kbarcode/kbarcode-editor.desktop

@@ -3,7 +3,13 @@ Encoding=UTF-8
 Type=Application
 Exec=kbarcode --label
 Icon=kbarcode.png
-DocPath=kbarcode/index.html
+# Restore the following key and remove this comment when a help handbook
+# is written. Disabling this key prevents populating the main handbook
+# table of contents with a non-existent document, which results in a
+# main handbook error message of
+# 'There is no documentation available for /xyz/index.html.'
+# Also disable this key when there exists only a useless template handbook.
+# DocPath=kbarcode/index.html
 Comment=Barcode and label printing tool editor
 Comment[de]=Werkzeug zum Barcode und Etiketten Druck Editor
 Terminal=false

kbarcode/kbarcode-single.desktop

@@ -3,7 +3,13 @@ Encoding=UTF-8
 Type=Application
 Exec=kbarcode --barcode
 Icon=kbarcode.png
-DocPath=kbarcode/index.html
+# Restore the following key and remove this comment when a help handbook
+# is written. Disabling this key prevents populating the main handbook
+# table of contents with a non-existent document, which results in a
+# main handbook error message of
+# 'There is no documentation available for /xyz/index.html.'
+# Also disable this key when there exists only a useless template handbook.
+# DocPath=kbarcode/index.html
 Comment=Barcode generation tool
 Comment[de]=Barcode Erstellung
 Terminal=0

kbarcode/kbarcode.desktop

@@ -4,7 +4,13 @@ Type=Application
 Exec=kbarcode -caption "%c" %i %m %f
 Icon=kbarcode.png
 MimeType=application/kbarcode-label
-DocPath=kbarcode/index.html
+# Restore the following key and remove this comment when a help handbook
+# is written. Disabling this key prevents populating the main handbook
+# table of contents with a non-existent document, which results in a
+# main handbook error message of
+# 'There is no documentation available for /xyz/index.html.'
+# Also disable this key when there exists only a useless template handbook.
+# DocPath=kbarcode/index.html
 Comment=Barcode and label printing tool
 Comment[de]=Werkzeug zum Barcode und Etiketten Druck
 Terminal=0