Same fix as `adb278b` but for the split-pane close glyph: clicking × fires the pane wrapper's `on_click(select_tab)` after the close runs. Add `cx.stop_propagation()` so the close ends at the glyph.
Same fix as `adb278b` but for the split-pane close glyph: clicking × fires the pane wrapper's `on_click(select_tab)` after the close runs. Add `cx.stop_propagation()` so the close ends at the glyph.