fix: filter out deleted jobs

[arthur-pinner]

Filter out deleted jobs while searching for them

While searching for existing jobs, if a previous job has been cancelled, the plugin does still display the View Job button.
When you click on the VIew Job butotn the image below is displayed in Smartling

Steps to reproduce:

1. Create a new content
2. Go to Translations Tab , select one or more locales and click on Create Job
3. After the job has been created, click on View Job to be redirect to Smartling job's page.
4. Click on Cancel button on the left (first widget) and provide a reason why you are canceling it
5. Go back to Translations Tab in Sanity Studio and refresh the page.
6. The View Job button is displayed (it should be displayed)