implement mechanism for "Go to Included Page" button to open page in new tab
The "Go to Included Page" button in a MultiExcerpt-Include macro in edit mode is a button but Confluence renders is as a link w/ href=#".
This breaks right-click-open-link-in-new-tab because "#" is a link to the current page and such an operation will open the current page (in edit mode) in a new tab. Not at all what the user wants.
The button is a property-panel button defined in the app descriptor so the implementation of the button markup is all done by Confluence:
In order to make right-click-open-link-in-new-tab work the "button" click hander function would probably need to be enhanced to stop making the browser treat it as a regular link to "#".