Minijack: Refactor view htmls.

Take out common elements of all pages, and put them into base.html. This
makes adding new buttons to navigation bar easier.

BUG=None
TEST=Manual
Start minijack frontend, check every page behaves as before the change.

Change-Id: Id5f4f018216177eaa1965a77442cb486e57edc56
Reviewed-on: https://gerrit.chromium.org/gerrit/62957
Commit-Queue: Pi-Hsun Shih <pihsun@chromium.org>
Reviewed-by: Pi-Hsun Shih <pihsun@chromium.org>
Tested-by: Pi-Hsun Shih <pihsun@chromium.org>
6 files changed