Using the suggestions made by @gutow in this thread, I am finding that when I set "newBrowserTab":"false"
the URL continues to open in a new window for both relative and absolute URLs. What is the criteria for making a URL open in the current window?
{
"menus": [
{
"id": "jp-mainmenu-file",
"items": [
{
"disabled": true,
"command": "hub:control-panel",
},
{
"command": "help:open",
"rank": 99,
"args": {"text": "Go to relative path", "url":"/my/relative/path", "newBrowserTab":"false"}
},
{
"command": "help:open",
"rank": 100,
"args": {"text": "Gutow Homesite absolute path", "url":"https://cms.gutow.uwosh.edu/Gutow", "newBrowserTab":"false"}
}
]
}
]
}