Selecting URL with right arrow key from the pulldown on URL bar re-selects the 1st entry

[luixxiul]

Test plan

1. Open https://github.com
2. Open several pages from the menu
3. Close the tabs
4. Input github to URL bar
5. Hit down arror key
6. Try selecting a URL from the pulldown with right arrow key

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Describe the issue you encountered: Selecting URL with right arrow key from the pulldown on URL bar re-selects the 1st entry.

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

• Brave Version (revision SHA): 0.15.304

• Actual result: the 1st URL is always re-selected

• Expected result:

• Is this an issue in the currently released version?
  No. The issue cannot reproduced on .300. I tried .303 and it can be reproduced.

• Extra QA steps:
  1.
  2.
  3.

• Any related issues:

[bsclifton]

reproduced on dev-channel (which is just a bit ahead of .304). Will look into this
(may be related to #8865 or the fix)

[bsclifton]

Removing milestone and closing as a duplicate of #5767

[bsclifton]

removed regression tag also, as this has been an issue for a while

[luixxiul]

I don't think this is the duplicate. This time with right arrow key you cannot select nothing than the 1st item. Here's a better STR:

1. Visit github.com
2. Visit github.com/Selecting URL with right arrow key from the pulldown on URL bar re-selects the 1st entry #8899#issuecomment-302233759
3. Input github.com
4. From the autocomplete list, select github.com/Selecting URL with right arrow key from the pulldown on URL bar re-selects the 1st entry #8899#issuecomment-302233759 with down arrow key
5. Hit right arrow key

Expected result: github.com//issues/8899#issuecomment-302233759 should be selected

Actual result; github.com (1st item) is re-selected

[luixxiul]

CC @srirambv for reproduction

[bbondy]

This seems to be fixed with my various commits for work on suggestions. Closing but please test.