ProcessDialog: Keep labels for screen readers on mobile
ProcessDialog: Keep labels for screen readers on mobile

Follow-up to I67b8474b0662f8dbc23c1b5ff883e3d4093bdbd4.

Bug: T225021
Change-Id: I2574fe31ff54e07de4f19c155f29d8e732ae3011

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui