[settings] minor fixes

Author: capcom6

app/src/main/java/me/capcom/smsgateway/modules/messages/MessagesSettings.kt

@@ -138,7 +138,7 @@ class MessagesSettings(
                 }
 
                 LIMIT_PERIOD -> {
-                    val newValue = value?.let { Period.valueOf(it.toString()) }
+                    val newValue = value?.let { Period.valueOf(it.toString()) } ?: Period.Disabled
                     val changed = this.limitPeriod != newValue
 
                     storage.set(key, newValue)
@@ -152,7 +152,7 @@ class MessagesSettings(
                         throw IllegalArgumentException("Limit value must be >= 1")
                     }
 
-                    val changed = this.limitValue != limitValue
+                    val changed = this.limitValue != (limitValue ?: 0)
 
                     storage.set(key, limitValue?.toString())
 
@@ -161,6 +161,7 @@ class MessagesSettings(
 
                 SIM_SELECTION_MODE -> {
                     val newValue = value?.let { SimSelectionMode.valueOf(it.toString()) }
+                        ?: SimSelectionMode.OSDefault
                     val changed = this.simSelectionMode != newValue
 
                     storage.set(key, newValue)
@@ -170,6 +171,7 @@ class MessagesSettings(
 
                 PROCESSING_ORDER -> {
                     val newValue = value?.let { ProcessingOrder.valueOf(it.toString()) }
+                        ?: ProcessingOrder.LIFO
                     val changed = this.processingOrder != newValue
 
                     storage.set(key, newValue)