Dismiss context menu when pressing tab and esc

[darkdh]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Fix #3709

Auditors: @bbondy

Test Plan:

1. Make input field popup autofill option or built in password manager
   option
2. Press esc or tab should dismiss popup

[bbondy]

++ thanks, right click context menus aren't cleared in chrome but they are in Firefox so this is fine.