context-menu: Avoid no-unnecessary-boolean-literal-compare warning.
context-menu: Avoid no-unnecessary-boolean-literal-compare warning.

Signed-off-by: Anders Kaseorg <dfdb7392591db597bc41cf266a9c3bc12a2706e5@zulip.com>

zulip/zulip-desktop,zulip/zulip-desktop,zulip/zulip-desktop,zulip/zulip-desktop