Change "none" to ""

Co-authored-by: Alexandru Ionut Tripon <alexandru.tripon97@gmail.com>
Signed-off-by: Jeffery Tolmie <jeffery.tolmie@gmail.com>

launcher/ui/widgets/ModFilterWidget.cpp

@@ -286,7 +286,7 @@ void ModFilterWidget::onSideFilterChanged()
     } else if (ui->clientSide->isChecked() && ui->serverSide->isChecked()) {
         side = "both";
     } else {
-        side = "none";
+        side = "";
     }