Replace the mobile icon + splash with new name

[lukaw3d]

          I am just giving LGTM, but would rather see if @buberdds looks at it as well, as he is more familiar with the project.

Mobile part looks good so far, need to check if anything break(it shouldn't), but we need to replace the icon + splash as it contains references to the old naming. @donouwens

Originally posted by @lubej in #1870 (review)

[donouwens]

Thanks @lukaw3d - let me know what you need from me (the icon as SVG or ico file perhaps) and I'll try to get you these asap (I'm OOO, so @buberdds might have them as well).

[lubej]

No worries @donouwens, this can be a backlog item, doesn't have to be done straight away. Just something to keep in mind before mobile release.

[buberdds]

I have created https://app.clickup.com/t/86948517y task hours ago. We don't need to worry about it now.

[lukaw3d]

Fixed by #1927