webui: New LibreNMS logo assets

[murrant]

SVG images where we can.
Updated favicon and app icons.

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[mention-bot]

Thank you for submitting a PR @murrant! We have found the following @laf, @Rosiak and @arjitc based on the history of these files to review this PR.

[murrant]

An example, not much different, but should look much better on HiDPI.

Old:

New:

[LibreNMS-CI]

Auto-Deploy finished, Test PR at http://5629.ci.librenms.org or https://5629.ci.librenms.org

[scrutinizer-notifier]

The inspection completed: No new issues

[InsaneSplash]

Nice!

[laf]

The only thing with this is the export to pdf (used once in alerts log), it doesn't render properly. Really not an issue but we should address.

[laf]

btw looks freakin sweet :)