docs: update docs to include isDisabled computed

docs/latest/extensions/modules/panel.md

@@ -40,6 +40,10 @@ export default {
           from: 'right',
           // The target component to toggle open/close
           target: 'target-component-id',
+          // UI Hint; If the target panel is in a "disabled" state
+          isDisabled: studies => {
+            return false;
+          },
           // Overrides `defaultContext`, if specified
           context: ['ACTIVE_VIEWPORT:MAGIC'],
         },

extensions/_example/src/index.js

@@ -21,7 +21,6 @@ export default {
   /**
    * MODULE GETTERS
    */
-
   getViewportModule() {
     return '... react component ...';
   },
@@ -98,6 +97,9 @@ const panelModule = {
       icon: 'th-list',
       label: 'Segments',
       target: 'segment-panel',
+      isDisabled: studies => {
+        return false;
+      },
     },
   ],
   components: [