Add showOptions method

Author: junichi11

src/main/java/com/junichi11/netbeans/modules/github/issues/utils/UiUtils.java

@@ -41,6 +41,8 @@
  */
 package com.junichi11.netbeans.modules.github.issues.utils;
 
+import com.junichi11.netbeans.modules.github.issues.options.GitHubIssuesOptions;
+import org.netbeans.api.options.OptionsDisplayer;
 import org.openide.DialogDisplayer;
 import org.openide.NotifyDescriptor;
 
@@ -75,4 +77,8 @@ private static Object showDialog(String message, int type) {
         return DialogDisplayer.getDefault().notify(descriptor);
     }
 
+    public static void showOptions() {
+        OptionsDisplayer.getDefault().open(GitHubIssuesOptions.SUB_PATH);
+    }
+
 }