Show payment entry modal on invoice page

[apoorv1316]

What

• Show payment entry modal onClick on the "Mark as paid" option on the Invoice page

Why

• For better UX. Earlier it used to redirect to the payments page

Loom:
https://www.loom.com/share/45ca4e3552ad40f191fb9373379727d6

[supriya3105]

Looks good .
There is a minor change required. The first field on the modal is displaying the client name whereas it should display the invoice number as well.
However that is an existing issue which we can fix in separate PR.