Change maxBasal minimum to 0.5 U/hr

from 1.0 U/hr

Address issue #201 from kyle.mcw

FreeAPS/Sources/Models/DecimalPickerSettings.swift

@@ -136,7 +136,7 @@ struct DecimalPickerSettings {
     var hours = PickerSetting(value: 6, step: 0.5, min: 2, max: 24, type: PickerSetting.PickerSettingType.hour)
     var dia = PickerSetting(value: 10, step: 0.5, min: 5, max: 10, type: PickerSetting.PickerSettingType.hour)
     var maxBolus = PickerSetting(value: 10, step: 0.5, min: 1, max: 30, type: PickerSetting.PickerSettingType.insulinUnit)
-    var maxBasal = PickerSetting(value: 10, step: 0.5, min: 1, max: 30, type: PickerSetting.PickerSettingType.insulinUnit)
+    var maxBasal = PickerSetting(value: 10, step: 0.5, min: 0.5, max: 30, type: PickerSetting.PickerSettingType.insulinUnit)
 }
 
 struct PickerSetting {