properly update the font size without restarting the app

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/MainActivity.kt

@@ -35,6 +35,7 @@ class MainActivity : SimpleActivity() {
     private val MAKE_DEFAULT_APP_REQUEST = 1
 
     private var storedTextColor = 0
+    private var storedFontSize = 0
     private var bus: EventBus? = null
 
     @SuppressLint("InlinedApi")
@@ -77,6 +78,10 @@ class MainActivity : SimpleActivity() {
             (conversations_list.adapter as? ConversationsAdapter)?.updateTextColor(config.textColor)
         }
 
+        if (storedFontSize != config.fontSize) {
+            (conversations_list.adapter as? ConversationsAdapter)?.updateFontSize()
+        }
+
         updateTextColors(main_coordinator)
         no_conversations_placeholder_2.setTextColor(getAdjustedPrimaryColor())
         no_conversations_placeholder_2.underlineText()
@@ -120,6 +125,7 @@ class MainActivity : SimpleActivity() {
 
     private fun storeStateVariables() {
         storedTextColor = config.textColor
+        storedFontSize = config.fontSize
     }
 
     // while SEND_SMS and READ_SMS permissions are mandatory, READ_CONTACTS is optional. If we don't have it, we just won't be able to show the contact name in some cases

app/src/main/kotlin/com/simplemobiletools/smsmessenger/adapters/ConversationsAdapter.kt

@@ -174,6 +174,11 @@ class ConversationsAdapter(activity: SimpleActivity, var conversations: ArrayLis
         }
     }
 
+    fun updateFontSize() {
+        fontSize = activity.getTextSize()
+        notifyDataSetChanged()
+    }
+
     fun updateConversations(newConversations: ArrayList<Conversation>) {
         val oldHashCode = conversations.hashCode()
         val newHashCode = newConversations.hashCode()