Thanks for the bug report! I had thought that perhaps adding collapse all/expand all to all the sections would potentially help with this. It's really useful for me to know that collapsing the whole sections is still a desirable feature. 

I will have to think a bit on how to best add a toggle collapse feature to the whole section that isn't confusing when we already have collapse/expand all. 

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/b52adb9090fafd482cc1570f321fdddcf2dc9ad2

commit b52adb9090fafd482cc1570f321fdddcf2dc9ad2
Author: Tiff Zhang <zhangtiff@google.com>
Date: Fri Jun 09 22:43:37 2017

SoM: Make infra failures/other alert sections collapsible and refactored alert categories into a separate element.

Bug:730315
Bug:718127
Bug:717717
Change-Id: I51bb83fa49bdf0c47a8db017cd8cc112b035ee64
Reviewed-on: https://chromium-review.googlesource.com/529966
Reviewed-by: Sean McCullough <seanmccullough@chromium.org>
Commit-Queue: Tiffany Zhang <zhangtiff@chromium.org>

[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-app/som-app.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-view/som-alert-view.html
[add] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-category/som-alert-category.js
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-annotation-manager-behavior.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-app/som-app.js
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-extension-build-failure/som-extension-build-failure.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-drawer/som-drawer.js
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-annotations/som-annotations.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-settings/som-settings.html
[add] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-category/som-alert-category.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-view/som-alert-view.js
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-item/som-alert-item.js
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/test/som-alert-item-test.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-drawer/som-drawer.html
[add] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-utility-styles.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-item/som-alert-item.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/test/som-alert-view-test.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-bug-queue/som-bug-queue.html
[add] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/test/som-alert-category-test.html
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-settings/som-settings.js
[modify] https://crrev.com/b52adb9090fafd482cc1570f321fdddcf2dc9ad2/go/src/infra/appengine/sheriff-o-matic/frontend/test/index.html

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/d15d07954c36210bfdb01a844daa7ae0477da642

commit d15d07954c36210bfdb01a844daa7ae0477da642
Author: Tiff Zhang <zhangtiff@google.com>
Date: Tue Jun 13 00:57:41 2017

SoM: Make all top level sections collapsible.

Bug:718127
Change-Id: I18066da728d7420bcc38998bfc821f644d7694ce
Reviewed-on: https://chromium-review.googlesource.com/530032
Reviewed-by: Sean McCullough <seanmccullough@chromium.org>
Commit-Queue: Tiffany Zhang <zhangtiff@chromium.org>

[modify] https://crrev.com/d15d07954c36210bfdb01a844daa7ae0477da642/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-category/som-alert-category.js
[modify] https://crrev.com/d15d07954c36210bfdb01a844daa7ae0477da642/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-swarming-bots/som-swarming-bots.html
[modify] https://crrev.com/d15d07954c36210bfdb01a844daa7ae0477da642/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-bug-queue/som-bug-queue.html
[modify] https://crrev.com/d15d07954c36210bfdb01a844daa7ae0477da642/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-category/som-alert-category.html
[modify] https://crrev.com/d15d07954c36210bfdb01a844daa7ae0477da642/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-alert-view/som-alert-view.html
[modify] https://crrev.com/d15d07954c36210bfdb01a844daa7ae0477da642/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-bug-queue/som-bug-queue.js
[modify] https://crrev.com/d15d07954c36210bfdb01a844daa7ae0477da642/go/src/infra/appengine/sheriff-o-matic/frontend/elements/som-swarming-bots/som-swarming-bots.js