Display pending notifications after connect flow

[Gudahtt]

The notification window is now kept open after the connect flow if there are still pending confirmations. Previously, the notification
window would be closed after the connect flow no matter what, and any pending confirmations would never be shown to the user.

This was accomplished by redirecting to the home screen after the connect flow. The logic for deciding whether or not to close the window is already handled by the home page. This does have the unfortunate side-effect of briefly rendering the home page before the window closes, but this is a minor problem that exists already in a number of other scenarios, and it will be fixed in a subsequent PR.

Fixes #8973

[Gudahtt]

This does have the unfortunate side-effect of briefly rendering the home page before the window closes, but this is a minor problem that exists already in a number of other scenarios, and it will be fixed in a subsequent PR.

This has been addressed in #9012

[metamaskbot]

Builds ready [606ffb6]

• builds: chrome, firefox, opera
• bundle viz: background, ui, inpage, contentscript, ui-libs, bg-libs, phishing-detect
• dep viz: background
• all artifacts

Page Load Metrics (556 ± 45 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	28	80	36	14	7
		domContentLoaded	311	637	553	95	46
		load	315	639	556	93	45
		domInteractive	310	637	553	95	46

[rekmarks]

#9012 is way better than what I had done here 👍