Describe the bug
Back button not working within invoice because a new tab is created

To Reproduce
Steps to reproduce the behavior:

1. Go to Services -> Pharmacy -> Pharmacy queue
2. Click on 'Billing' -> Select the stock and create invoice -> Issue invoice
3. Go back
4. Go to dispense queue -> View any account -> View Invoice
5. Click on back there
6. See error

Expected behavior
If 'view invoice' option goes into new tab then, it should not have a back option

Desktop (please complete the following information):

• iOS

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