Inconsistent replacing of characters in path names

Starting with sitespeed.io:16.0.2, some characters (at least the colon) in path names are in some places replaced to a "-", in other places not replaced at all.

To reproduce the issue create an urls.txt file with a ":" in the alias part:

$ cat /tmp/sitespeed/urls.txt 
https://www.sitespeed.io foo:bar

$ docker run --name=sitespeed_mobile --privileged --shm-size=1g --rm -v /tmp/sitespeed:/sitespeed.io sitespeedio/sitespeed.io:16.8.0 --browsertime.iterations 1 -b chrome ./urls.txt
...
[2021-02-08 13:59:50] INFO: Could not read filmstrip dir Error: ENOENT: no such file or directory, scandir '/sitespeed.io/sitespeed-result/www.sitespeed.io/2021-02-08-13-59-34/pages/www_sitespeed_io/foo-bar/data/filmstrip/1''
[2021-02-08 13:59:52] INFO: Could not read filmstrip dir Error: ENOENT: no such file or directory, scandir '/sitespeed.io/sitespeed-result/www.sitespeed.io/2021-02-08-13-59-34/pages/www_sitespeed_io/foo-bar/data/filmstrip/1''
...

Looking at the result pages, it's not possible to access the screenshot image or video.

The file tree also shows the inconsistent replacing:

$ cd /tmp/sitespeed/sitespeed-result/www.sitespeed.io/2021-02-08-13-59-34
$ find pages/www_sitespeed_io/
pages/www_sitespeed_io/
pages/www_sitespeed_io/foo:bar
pages/www_sitespeed_io/foo:bar/data
pages/www_sitespeed_io/foo:bar/data/video
pages/www_sitespeed_io/foo:bar/data/video/1.mp4
pages/www_sitespeed_io/foo:bar/data/video/images
pages/www_sitespeed_io/foo:bar/data/video/images/1
pages/www_sitespeed_io/foo:bar/data/screenshots
pages/www_sitespeed_io/foo:bar/data/screenshots/1
pages/www_sitespeed_io/foo:bar/data/screenshots/1/afterPageCompleteCheck.png
pages/www_sitespeed_io/foo:bar/data/filmstrip
pages/www_sitespeed_io/foo:bar/data/filmstrip/1
pages/www_sitespeed_io/foo:bar/data/filmstrip/1/ms_000733.png
pages/www_sitespeed_io/foo:bar/data/filmstrip/1/ms_000000.png
pages/www_sitespeed_io/foo:bar/data/filmstrip/1/ms_000666.png
pages/www_sitespeed_io/foo-bar
pages/www_sitespeed_io/foo-bar/data
pages/www_sitespeed_io/foo-bar/data/browsertime.har
pages/www_sitespeed_io/foo-bar/1.html
pages/www_sitespeed_io/foo-bar/index.html