DOC-1928: Fix editimage toolbar button level offset

Author: Farzad Hayatbakhsh

modules/ROOT/pages/editimage.adoc

@@ -73,7 +73,7 @@ include::partial$configuration/editimage_toolbar.adoc[leveloffset=+1]
 
 include::partial$configuration/editimage_upload_timeout.adoc[leveloffset=+1]
 
-include::partial$misc/plugin-toolbar-button-id-boilerplate.adoc[leveloffset=+1]
+include::partial$misc/plugin-toolbar-button-id-boilerplate.adoc[]
 
 == Commands