[MD settings] minor changes to make OnStartup elements line up better

[MD settings] minor changes to make OnStartup elements line up better

This CL puts a little extra space between the list and the buttons.
It also makes the items paper-icon-items so they line up better.

BUG=531750
Committed: https://crrev.com/d755e4bf5100fa835c8a3d426937aa7dbf9c47f8
Cr-Commit-Position: refs/heads/master@{#348778}

[dschuyler, 2015-09-14 17:38:41]

dschuyler@chromium.org changed reviewers:
+ michaelpg@chromium.org

[dschuyler, 2015-09-14 17:38:56]

The CQ bit was checked by dschuyler@chromium.org

[commit-bot: I haz the power, 2015-09-14 17:40:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1338363003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1338363003/1

[commit-bot: I haz the power, 2015-09-14 17:40:15]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-14 17:40:16]

No L-G-T-M from a valid reviewer yet. Only full committers are accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[michaelpg, 2015-09-14 19:02:58]

lgtm, but can you make a separate bug for the On Startup section?

[dschuyler, 2015-09-14 23:27:04]

The CQ bit was checked by dschuyler@chromium.org

[commit-bot: I haz the power, 2015-09-14 23:28:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1338363003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1338363003/1

[commit-bot: I haz the power, 2015-09-15 00:04:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-15 00:05:26]

Patchset 1 (id:??) landed as
https://crrev.com/d755e4bf5100fa835c8a3d426937aa7dbf9c47f8
Cr-Commit-Position: refs/heads/master@{#348778}

[commit-bot: I haz the power, 2015-09-23 12:39:42]

Patchset 1 (id:??) landed as
https://crrev.com/d755e4bf5100fa835c8a3d426937aa7dbf9c47f8
Cr-Commit-Position: refs/heads/master@{#348778}