(Re)Add Test button to server connect db panel

Didn’t we previously have the ability to test a server connect db connection (not direct)?

Testing this connection is just as necessary as a direct connection test.

Well actually there is a reason while we removed the test button. On the Server Connect DB Connection dialog.

In the Database Manager, as the connections are direct - testing is easy and available. But in Server Connect the connection options are from within the server. So to really test them we have to upload a dummy action that makes a connection and execute it… That might not be very optimal on some production targets as well it also needs to restart the server to test it - so it can take a while to execute.

We do similar thing we the custom db query actions that have a run query inside, and also want to use it in future - test query dialogs. So we will see if we can find a more optimal way to do this.