Make kate plugins help handbook visible in the help handbook table of contents but not in launcher menu.

kate/CMakeLists.txt

@@ -27,3 +27,7 @@ add_subdirectory( snippets )
 add_subdirectory( insertcommand )
 add_subdirectory( make )
 add_subdirectory( helloworld )
+
+#### other data #################################
+
+install( FILES kate-plugins.desktop DESTINATION ${APPS_INSTALL_DIR}/.hidden )

kate/Makefile.am

@@ -2,4 +2,5 @@ SUBDIRS = scripts htmltools kpybrowser modeline openheader textfilter xmltools \
 	xmlcheck filelistloader cppsymbolviewer tabbarextension filetemplates \
 	snippets insertcommand make helloworld
 
-
+app_DATA = kate-plugins.desktop
+appdir = $(kde_appsdir)/.hidden

kate/kate-plugins.desktop

@@ -0,0 +1,6 @@
+[Desktop Entry]
+Icon=kate
+DocPath=kate-plugins/index.html
+Categories=Qt;TDE;TextEditor;
+NoDisplay=true
+Name=Kate Plugins