Add-on shows last 24 hours in “Today”-mode

[blandaadrian]

Firstly, great project, I really appreciate it!

Minor issue that caused just a bit of confusion:

In the Web-Dashboard, we can select “Today”, “Yesterday”, “Last 24 Hours” – all of them doing what's expected.
In the Browser Add-on, “Today” seems to show the data of the last 24 Hours for me.

Would be nice if the same filters were available on both, but even just changing the name of the add-on filter to “last 24 Hours” would solve the confusion for me.