Make notifications sidebar have indicator to draw attention

[balamurali27]

We show notifications for failures that users don't check that much (~40%): https://cloud.frappe.io/app/press-notification/view/report?_group_by=%5B%22%60tabPress+Notification%60.%60read%60%22%2Cnull%2C%22count%22%5D

Ours:

Theirs:

[ssiyad]

there is already a count. what makes you think people will open it if there is a dot?

[regdocs]

@ssiyad I'd click on that button just to see that annoying blue dot go away. I think that's the idea.

Reading notifications would be a secondary purpose.