dolphinmainwindow,dolphinview: clarify QPointer semantics around exec()

exec() runs a nested event loop that can destroy the parent widget, so
the post-exec null-check on the QPointer is intentional, not redundant.

dolphinmainwindow: replace `if (contextMenu) deleteLater()` with
`delete contextMenu`. QPointer returns nullptr for a destroyed object,
making delete a safe no-op.

dolphinview: capture the menu as a raw pointer for pre-exec setup;
reserve the QPointer for the post-exec liveness check and deletion.

0 files changed, 0 insertions, 0 deletions