Startup ProgressMeter label positioning issues

[UpcraftLP]

When showing a custom progress message via ProgressMeter#label(), there is no way to know the rendered size in the window, or how much space is available; If a line is too long, it simply goes off screen. This should automatically be wrapped to a fixed max size, and split into multiple lines.

Further, while using \n to split text into multiple lines is already possible, the label is not moved upwards to account for the additional lines, making them display behind the progress bar: