Progress bar UX update

[anthonypkeane]

Description:

Link: https://bravesoftware.slack.com/archives/C06UXF3KJ/p1622509944112800

In iOS brave it seems like we don’t get a progress bar until the first byte of the HTML response has been received. This is different from Safari, where you get the initial ~10% of the progress bar filled once the request has been issued. To my experience, the Safari approach feel nicer, since if you’re in a really slow network situation, clicking on links seems to do nothing at all for a while, making it seem like the browser has locked up.

[srirambv]

Verification passed on iPhone XR with iOS 13.5 running 1.29(21.7.20.16)

• Verified test plan from Fix #3892: Improve progress bar reactivity #3893
• Verified as soon as page loads the progress bar shows 10% loaded instead of waiting for page to fully load

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Verification passed on iPhone 7+ with iOS 14.5.1 running 1.29(21.7.20.16)

• Verified test plan from Fix #3892: Improve progress bar reactivity #3893
• Verified as soon as page loads the progress bar shows 10% loaded instead of waiting for page to fully load

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Verification passed on iPad Pro with iOS 14.6 running 1.29(21.7.20.16)

• Verified test plan from Fix #3892: Improve progress bar reactivity #3893
• Verified as soon as page loads the progress bar shows 10% loaded instead of waiting for page to fully load