feat(gui): select a class to open via command-line (PR #658)

jadx-cli/src/main/java/jadx/cli/JadxCLIArgs.java

@@ -130,7 +130,7 @@ public class JadxCLIArgs {
 	 * Used to merge saved options and options passed in command line.
 	 */
 	public boolean overrideProvided(String[] args) {
-		JCommanderWrapper<JadxCLIArgs> jcw = new JCommanderWrapper<>(new JadxCLIArgs());
+		JCommanderWrapper<JadxCLIArgs> jcw = new JCommanderWrapper<>(newInstance());
 		if (!jcw.parse(args)) {
 			return false;
 		}
@@ -138,6 +138,10 @@ public class JadxCLIArgs {
 		return process(jcw);
 	}
 
+	protected JadxCLIArgs newInstance() {
+		return new JadxCLIArgs();
+	}
+
 	private boolean process(JCommanderWrapper<JadxCLIArgs> jcw) {
 		if (printHelp) {
 			jcw.printUsage();