broaden AF pickers

Update Adjustment Factor pickers for Dynamic Settings to step by 5% rather than 10%. Also, allow Sigmoid AF to be set as low as 10% and Log AF as low as 30%.

FreeAPS/Sources/Models/DecimalPickerSettings.swift

@@ -119,11 +119,11 @@ struct DecimalPickerSettings {
         max: 0.4,
         type: PickerSetting.PickerSettingType.factor
     )
-    var adjustmentFactor = PickerSetting(value: 0.8, step: 0.1, min: 0.5, max: 1.5, type: PickerSetting.PickerSettingType.factor)
+    var adjustmentFactor = PickerSetting(value: 0.8, step: 0.05, min: 0.3, max: 1.5, type: PickerSetting.PickerSettingType.factor)
     var adjustmentFactorSigmoid = PickerSetting(
         value: 0.5,
-        step: 0.1,
-        min: 0.5,
+        step: 0.05,
+        min: 0.1,
         max: 2,
         type: PickerSetting.PickerSettingType.factor
     )