search: regression: refresh current view when canceling a scrollback search

3b41379be4 introduced a regression,
where canceling a scrollback search didn’t refresh the viewport
correctly; the viewport was changed, but the screen content was not
refreshed.

This worked before, because the workaround for
https://github.com/swaywm/sway/issues/6960 always called
term_damage_view() when exiting scrollback search mode.

3b41379be4 removed that call since it’s
no longer required. *Except* when executing the
BIND_ACTION_SEARCH_CANCEL binding, since then the viewport may be
moved.

Note that this regression affected *all* compositors, not just Sway.

Closes #1354

search.c

@@ -829,6 +829,7 @@ execute_binding(struct seat *seat, struct terminal *term,
             grid->view = ensure_view_is_allocated(
                 term, term->search.original_view);
         }
+        term_damage_view(term);
         search_cancel(term);
         return true;