Show a regular progress bar

[GergelyKalmar]

The current console reporting options are a bit limited. Having the progress shown only when the dots reach the end of the terminal window is not quite optimal. Optimally I'd just want to see the number of tests completed vs the overall number of tests. When there's an error the progress bar could change its color (e.g. from green to red), or perhaps we could have a stacked bar of the different statuses (e.g. green for tests running, gray for tests waiting to be run, red for tests failing and dark green/orange/yellow/cyan for tests skipped).

[xmo-odoo]

FWIW -v shows per-test progress percentage, though it is verbose indeed.