Software update popup should not be presented during Sparkle update process

[mbacchi]

In issue #9274 there is discussion of the Changelog content which is raw html. That issue notes that Brave should simply update in the background and not present a choice to the user to install the update, skip it or remind them later.

This might be a permissions issue with Sparkle (described here). We will investigate this and attempt to make it auto update for all cases.

[kjozwiak]

Reproduced the issue on macOS 👍 As @mbacchi mentioned, it's basically due to not being an admin while an update occurs:

STR:

• install Brave on macOS on a none admin user
• check for an update and you'll get the above when there's an update available

[twood02]

I experience this issue on OS X 10.15.1 even though my account is an administrator account.