Links Should Open Focused Tabs

[jonathansampson]

Test plan

#8863 (comment)

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• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  Links designed to open in a new tab do so without taking focus.

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Desktop

• Brave Version (revision SHA):
  04ceba3

• Steps to reproduce:

1. Go to https://twitter.com/brave/status/794221010484502528
2. Click brave.com/donloads.html link

• Actual result:
  Tab opens without taking focus.

• Expected result:
  New will be given focus.

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  No

• Can this issue be consistently reproduced?
  Yes