Fixes tag sorting

[SpedNSFW]

I was incorrectly under the impression that the default order of tags with no sorting applied would be by tag count. It was brought to my attention that this wasn't the case.

What this PR changes:

• Changes the default sort to an empty string and uses it to only load WebUI options once.
• Adds an else-if to where the sorting is applied to actually sort by tag counts.
• Loads the WebUI options on mount of the App view and removes it from the InterfaceWeb view