fix: Creation group with Safari

[Merkur39]

### 🐛 Bug Fixes

* On Safari, the SelectBox menu for group creation from a contact's info modal passes below the content of the modal.
  The change in approach to handling menu closure when clicked outside the menu means we can remove the `z-index` forced on the `react-select` container that was causing the problem.

[bundlemon]

BundleMon

Files updated (2)

Status	Path	Size	Limits
✅	app/contacts.(hash).js	281.95KB (-13B 0%)	-
✅	vendors/contacts.(hash).js	684.59KB (-3.51KB -0.51%)	-

Unchanged files (4)

Status	Path	Size	Limits
✅	services/keepIndexFullNameAndDisplayNameUpToD ate/contacts.js	311.01KB	-
✅	intents/contacts.(hash).js	27.36KB	-
✅	app-contacts.(hash).min.css	27.15KB	-
✅	img/icon.(hash).svg	454B	-

Total files change -3.53KB -0.26%

Groups updated (1)

Status	Path	Size	Limits
✅	**/*.js	1.27MB (-3.53KB -0.27%)	-

Unchanged groups (2)

Status	Path	Size	Limits
✅	**/*.css	85.02KB	-
✅	img/.	454B	-

Final result: ✅

View report in BundleMon website ➡️

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