fix(gui): don't reset package alias on class rename (#1732)

jadx-gui/src/main/java/jadx/gui/treemodel/JClass.java

@@ -220,7 +220,8 @@ public class JClass extends JLoadableNode implements JRenameNode {
 
 	@Override
 	public void removeAlias() {
-		cls.removeAlias();
+		// reset only short name, package name should be reset explicitly using PackageNode
+		cls.getClassNode().rename("");
 	}
 
 	@Override

jadx-gui/src/main/java/jadx/gui/ui/dialog/RenameDialog.java

@@ -125,8 +125,9 @@ public class RenameDialog extends JDialog {
 	private void processRename(String newName, Set<ICodeRename> renames) {
 		ICodeRename rename = node.buildCodeRename(newName, renames);
 		renames.remove(rename);
-		node.removeAlias();
-		if (!newName.isEmpty()) {
+		if (newName.isEmpty()) {
+			node.removeAlias();
+		} else {
 			renames.add(rename);
 		}
 	}

jadx-gui/src/main/java/jadx/gui/utils/pkgs/JRenamePackage.java

@@ -99,4 +99,9 @@ public class JRenamePackage implements JRenameNode {
 		mainWindow.rebuildPackagesTree();
 		mainWindow.reloadTree();
 	}
+
+	@Override
+	public String toString() {
+		return refPkg.toString();
+	}
 }