Add feature flag

package.json

@@ -219,6 +219,11 @@
           "type": "boolean",
           "default": true,
           "description": "Enable the \"All Project Merge Requests\" sidebar pane"
+        },
+        "gitlab.enableExperimentalFeatures": {
+          "type": "boolean",
+          "default": false,
+          "description": "Enable experimental features including showing Issue details in VSCode"
         }
       }
     }

src/sidebar_tree_item.js

@@ -4,11 +4,13 @@ class SidebarTreeItem extends vscode.TreeItem {
   constructor(title, data) {
     super(title);
 
+    const { enableExperimentalFeatures } = vscode.workspace.getConfiguration('gitlab');
+
     if (data) {
       let command = 'gl.showRichContent';
       let arg = data;
 
-      if (data.sha) {
+      if (data.sha || !enableExperimentalFeatures) {
         command = 'vscode.open';
         arg = vscode.Uri.parse(data.web_url);
       }