Wait… I was over thinking it.
One can simply add something like this to /osta/user-styles.css in osTicket Awesome for 1.10.6:
a.Icon.Ticket.preview b,
a.Icon.emailTicket.preview b,
a.Icon.phoneTicket.preview b,
a.Icon.webTicket.preview b,
a.Icon.otherTicket.preview b {
font-weight: 700;
font-size: 10px;
font-family: 'Open Sans', sans-serif;
color: #004d73;
}
This will alter the Ticket Number text, which is how “Reply Waiting” is indicated in osTicket 1.10.x. You can change the font size, color, etc. as desired.
This will also work in osTicket Awesome for 1.10.7 when it is released.