Bug 1020779 - Adjust the key alignment for the bottom row of keyboard.
 - Also modify the tests for correct promise pattern
Merge pull request #22204 from RudyLu/keyboard/Bug1020779-bottom_keys_alignment

Bug 1020779 - Adjust the key alignment for the bottom row of keyboard.
r=timdream.
Revert "Merge pull request #22204 from RudyLu/keyboard/Bug1020779-bottom_keys_alignment"

This reverts commit 1dd9769ebfc90ce02dca843dedd3e8a173a0454c, reversing
changes made to cc5af5e8130ad81fda59b49d8213fbd67e1a0ddd.
Merge remote-tracking branch 'upstream/master'