add role access limitions for menu items.

This allows external-plugin menu items to conditionally
be added to the UI depending on the logged in users
current role.

pkg/plugins/models.go

@@ -41,9 +41,10 @@ type ExternalPluginJs struct {
 }
 
 type ExternalPluginNavLink struct {
-	Text string `json:"text"`
-	Icon string `json:"icon"`
-	Href string `json:"href"`
+	Text    string          `json:"text"`
+	Icon    string          `json:"icon"`
+	Href    string          `json:"href"`
+	ReqRole models.RoleType `json:"reqRole"`
 }
 
 type ExternalPluginCss struct {