GitLab

- Remove outline on click for:
  - Speech microphone icon
  - Shortcut
  - Edit link icon
  - Edit link dialog buttons
- Fix icon for restore default:
  - https://screenshot.googleplex.com/iVG7ohvNcXUp.png
- Prevent keyboard navigation to disabled "Restore default..." options.
- Keyboard navigation will start at edit dialog after it opens.
- Show add shortcut title for adding instead of edit shortcut.
- Can tab to add shortcut button.
- Keyboard navigation will remain within the edit shortcut dialog when
  open.
- Remove dark gray on click for the edit icon when dark theme/custom
  background.
- Clicking "Done" without modifying anything closes the dialog.
- Allow screen reader to move left/right through the links and edit link
  icons. (User must first use ctrl+shift+opt+down to enter the iframe).
- Prefill URL field with "https://". Text will turn dark gray on text
  input.
  - https://screenshot.googleplex.com/oBJNX4KHxeq.png
  - https://screenshot.googleplex.com/YpbDqiz0hkM.png
- Added labels to all buttons for screen readers ("name" attribute).
  - Edit = "Edit shortcut <title>"
  - Delete = "Remove <title>"
  - Cancel = "Cancel"
  - Edit icon = "Edit shortcut <title>"

Bug: 864357
Change-Id: Ie33248a0f633180e81e7a55373b06fb564f5596a
Reviewed-on: https://chromium-review.googlesource.com/1161096
Commit-Queue: Kristi Park <kristipark@chromium.org>
Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580949}