Placeholder indentation in search box shifts when activated

[idh-86]

Describe the bug When someone clicks on the search box, the 'Search' placeholder text shifts to the right. I believe it should remain stationary as it does on the NHS website.

To Reproduce Steps to reproduce the behavior:

1. Click in the 'Search' box
2. View the placeholder text shift to the right

Expected behavior The text should remain stationary.

Screenshots NHS website (deselected): NHS website (selected):

Nightingale (deselected): Nightingale (selected):

[maheshmuralip]

This looks fine in v2.7.0. Thanks much @idh-86