Using a duplicate server name replaces the old one with no warning

[andythetech]

Describe the bug
When creating a new server with the same name, it replaces the old one with no warning.

To Reproduce
Steps to reproduce the behavior:

1. Create a new server
2. Create another server with the same name
3. See that it has replaced the first one without warning

Expected behavior
If using the default name for the servers, when creating a new server, the name should change to "Fancy Server Name 2" in the text box. If the name matches another server with the same name, it should require the name to be changed before saving

Server and Plugin Informations

• ReactClient Version: 2.5
• Operating System (if applicable): Windows 10