Tweaks: Improve badge hiding tweak reliability

[marcustyphoon]

Description

This improves the badge-hiding tweaks by:

• removing reliance on translation strings that have multiple possible translation values in selectors (checked via https://gist.github.com/marcustyphoon/5cffac5d1c480603696e777632943f3a), ensuring they work in all UI languages
• adding li to selectors missing them, an oversight that made them not apply to the mobile menu
• adding an alternative href attribute used for the old (pre-vertical-nav) dashboard, in case anyone is still running that

Resolves #1461.

Testing steps

Confirm that the notification badge hiding tweaks work:

• in all page widths of the regular desktop layout
• in the mobile layout menu tray

[marcustyphoon]

adding an alternative href attribute used for the old (pre-vertical-nav) dashboard, in case anyone is still running that

Not sure if this code was just removed from Tumblr, but I can't be bothered to check :D