perf hists browser: Restore ESC as "Zoom out" of DSO/thread/etc

perf hists browser: Restore ESC as "Zoom out" of DSO/thread/etc

We need to set actions->ms.map since dc3f1d43bfac ("perf hists browser:
Check sort keys before hot key actions"), as in that patch we bail out
if map is NULL.

Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Fixes: dc3f1d43bfac ("perf hists browser: Check sort keys before hot key actions")
Link: https://lkml.kernel.org/n/tip-wp1ssoewy6zihwwexqpohv0j@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>