feat: add dialog to ask whether to chaneg instance's name

This prevents custom names from being lost when updating, by only
changing the name if the old instance name constains the old version,
so that we can update it if the user whishes to.

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/InstanceList.cpp

@@ -908,11 +908,6 @@ bool InstanceList::commitStagedInstance(QString path, InstanceName const& instan
                 qWarning() << "Failed to override" << path << "to" << destination;
                 return false;
             }
-
-            if (!inst)
-                inst = getInstanceById(instID);
-            if (inst)
-                inst->setName(instanceName.name());
         } else {
             if (!dir.rename(path, destination)) {
                 qWarning() << "Failed to move" << path << "to" << destination;