Users/bogercraig/blank ttl default value (#1596)

* Initial rough of keeping textfield blank.  Still need to disable save button.

* Rough implementation with state moved up to settings component.  Allows for discarding of new TTL when TTL is already enabled.

* Updating unit tests to include new display variable.

* Brought formatting back from master.

* Updating unit test snapshots.

* Ran prettier and renormalized modified files.

* Correct lint issues.

* Undo prettier changes to add collection code and testing snapshot.

* Restoring AddCollectionPanel to match master.  Not modifying snapshot.

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Co-authored-by: Craig Boger <craig.boger@microsoft.com>

src/Explorer/Controls/Settings/SettingsSubComponents/SubSettingsComponent.test.tsx

@@ -20,6 +20,10 @@ describe("SubSettingsComponent", () => {
     onTimeToLiveSecondsChange: () => {
       return;
     },
+    displayedTtlSeconds: "1000",
+    onDisplayedTtlSecondsChange: () => {
+      return;
+    },
 
     geospatialConfigType: GeospatialConfigType.Geography,
     geospatialConfigTypeBaseline: GeospatialConfigType.Geography,