[wip/exalm/gtk4-overview] Browser crash upon closing last tab in overview
Problem
Epiphany crashes and closes all windows upon closing the last tab in overview mode.
Expected behaviour
Epiphany should either prevent the last tab from being closed in overview, or disable overview when there is only one tab left, or gracefully close the window when the last tab is closed in overview.
Tested on
Latest Flatpak artifacts from wip/exalm/gtk4-overview