Default smbInterval now 2

FreeAPS/Sources/Models/Preferences.swift

@@ -37,7 +37,7 @@ struct Preferences: JSON {
     var allowSMBWithHighTemptarget: Bool = false
     var maxSMBBasalMinutes: Decimal = 30
     var maxUAMSMBBasalMinutes: Decimal = 30
-    var smbInterval: Decimal = 3
+    var smbInterval: Decimal = 2
     var bolusIncrement: Decimal = 0.1
     var curve: InsulinCurve = .rapidActing
     var useCustomPeakTime: Bool = false