Fix configs sharing an index

ios/App/App/plugins/AbsDatabase.swift

@@ -43,7 +43,7 @@ public class AbsDatabase: CAPPlugin {
         
         let config = ServerConnectionConfig()
         config.id = id ?? ""
-        config.index = 1
+        config.index = 0
         config.name = name
         config.address = address
         config.userId = userId

ios/App/Shared/util/Database.swift

@@ -20,6 +20,20 @@ class Database {
         let realm = try! Realm()
         let existing: ServerConnectionConfig? = realm.object(ofType: ServerConnectionConfig.self, forPrimaryKey: config.id)
         
+        if let existing = existing {
+            do {
+                try existing.update {
+                    existing.name = config.name
+                    existing.address = config.address
+                    existing.userId = config.userId
+                    existing.username = config.username
+                    existing.token = config.token
+                }
+            } catch {
+                NSLog("failed to update server config")
+                debugPrint(error)
+            }
+        } else {
             if config.index == 0 {
                 let lastConfig: ServerConnectionConfig? = realm.objects(ServerConnectionConfig.self).last
                 
@@ -32,15 +46,13 @@ class Database {
             
             do {
                 try realm.write {
-                if existing != nil {
-                    realm.delete(existing!)
-                }
                     realm.add(config)
                 }
             } catch(let exception) {
                 NSLog("failed to save server config")
                 debugPrint(exception)
             }
+        }
         
         setLastActiveConfigIndex(index: config.index)
     }