Consider values < 40mg/dL as unreliable (#732)

Author: ps2

Loop/Managers/CGM/DexCGMManager.swift

@@ -93,7 +93,7 @@ final class ShareClientManager: CGMManager {
 
             // Ignore glucose values that are up to a minute newer than our previous value, to account for possible time shifting in Share data
             let startDate = self.delegate?.startDateToFilterNewData(for: self)?.addingTimeInterval(TimeInterval(minutes: 1))
-            let newGlucose = glucose.filterDateRange(startDate, nil).map {
+            let newGlucose = glucose.filterDateRange(startDate, nil).filter({ $0.isStateValid }).map {
                 return (quantity: $0.quantity, date: $0.startDate, isDisplayOnly: false)
             }
 

Loop/Managers/LoopDataManager.swift

@@ -890,8 +890,6 @@ final class LoopDataManager {
             throw LoopError.configurationError("Check settings")
         }
 
-        let pendingInsulin = try self.getPendingInsulin()
-
         guard lastRequestedBolus == nil
         else {
             // Don't recommend changes if a bolus was just requested.
@@ -903,20 +901,22 @@ final class LoopDataManager {
         }
 
         let tempBasal = predictedGlucose.recommendedTempBasal(
-                to: glucoseTargetRange,
-                suspendThreshold: settings.suspendThreshold?.quantity,
-                sensitivity: insulinSensitivity,
-                model: model,
-                basalRates: basalRates,
-                maxBasalRate: maxBasal,
-                lastTempBasal: lastTempBasal
-            )
+            to: glucoseTargetRange,
+            suspendThreshold: settings.suspendThreshold?.quantity,
+            sensitivity: insulinSensitivity,
+            model: model,
+            basalRates: basalRates,
+            maxBasalRate: maxBasal,
+            lastTempBasal: lastTempBasal
+        )
 
         if let temp = tempBasal {
             recommendedTempBasal = (recommendation: temp, date: startDate)
         } else {
             recommendedTempBasal = nil
         }
+
+        let pendingInsulin = try self.getPendingInsulin()
 
         let recommendation = predictedGlucose.recommendedBolus(
             to: glucoseTargetRange,

Loop/Models/ServiceAuthentication/AmplitudeService.swift

@@ -46,6 +46,7 @@ class AmplitudeService: ServiceAuthentication {
 
         isAuthorized = true
         let client = Amplitude()
+        client.disableIdfaTracking()
         client.disableLocationListening()
         client.initializeApiKey(APIKey)
         self.client = client

Loop/Models/ShareGlucose+GlucoseKit.swift

@@ -26,7 +26,7 @@ extension ShareGlucose: GlucoseValue {
 
 extension ShareGlucose: SensorDisplayable {
     public var isStateValid: Bool {
-        return glucose >= 20
+        return glucose >= 39
     }
 
     public var trendType: GlucoseTrend? {