FE: List view differences between multisite and single site

[obenland]

There are a handful of differences between multisite list view and single site list view.
Which ones of these do we want to change?

	Multisite	Single Site
Button	bigger radius corners	smaller radius corners
Button text	New schedule	+ Add new schedule
Title	Update schedules	Plugin Update Manager
Subtitle	Doesn't exist	Exists
Table heading	Doesn't exist	Exists
Table borders	Doesn't exist	Exists

Screen.Recording.2024-05-07.at.11.49.37.AM.mov

@JanaMW27 Can we re-use the style of the multisite list view on single site and break it out of that box?

[JanaMW27]

Yes, let's use the styles from multi-site since it is the one designed latest and accounts for all the different scenarios.

[TimBroddin]

I'm starting on bringing the style of the multisite view to single site.

[TimBroddin]

@obenland @JanaMW27 Here's a preview without the box: #90443

You're free to leave feedback in the PR.