Button Alignment issue in Complete Order Page

[mohitm15]

Describe the bug

Button Alignment issue in Complete Order Page in Mobile view.

To Reproduce
Steps to reproduce the behaviour:

1. Go to 'Add order'
2. Add order
3. Complete the order details
4. See error

Expected behaviour

Should be aligned to center in mobile view.

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu :18.04
• Browser :Chrome
• Version [e.g. 22]

Additional context

Working on this.