增加判断是否课程页面的方法，前端使用

modules/context/context.go

@@ -65,6 +65,15 @@ func (ctx *Context) IsUserRepoAdmin() bool {
 	return ctx.Repo.IsAdmin()
 }
 
+func (ctx *Context) IsCourse() bool {
+	if ctx.Org != nil && ctx.Org.Organization != nil {
+		if ctx.Org.Organization.Name == setting.Course.OrgName {
+			return true
+		}
+	}
+	return false
+}
+
 // IsUserRepoWriter returns true if current user has write privilege in current repo
 func (ctx *Context) IsUserRepoWriter(unitTypes []models.UnitType) bool {
 	for _, unitType := range unitTypes {