[SMS Plugin] Don't remove the sending address if it is the only thing in the list

src/org/kde/kdeconnect/Plugins/SMSPlugin/SmsMmsUtils.java

@@ -123,9 +123,12 @@ public class SmsMmsUtils {
         }
 
         if (sendingPhoneNumber.number != null) {
+            // If the message is going to more than one target (to allow the user to send a message to themselves)
+            if (addressList.size() > 1) {
                 // Remove the user's phone number if present in the list of recipients
                 addressList.removeIf(address -> sendingPhoneNumber.isMatchingPhoneNumber(address.address));
             }
+        }
 
         try {
             Settings settings = new Settings();