Update toggle component

- Adds text to indicate the current state of the toggle button to meet
  accessibility guidelines
- Update size, color, and focus of toggle component to fix
  DAP violations
- Add page, section, and list-pair layout patterns established
  on the power usage page to begin a pattern for consistent
  page layout
- Add form__field and form__actions to help with form layout
  consistency.

Tested: Verified toggle functions in the GUI and tested with screen reader. Passes DAP.

Signed-off-by: Dixsie Wolmers <dixsiew@gmail.com>
Change-Id: Iaa8646b1179cc307971065c455f4b9448095d1ec
diff --git a/app/overview/styles/system-overview.scss b/app/overview/styles/system-overview.scss
index ed010aa..627ecf5 100644
--- a/app/overview/styles/system-overview.scss
+++ b/app/overview/styles/system-overview.scss
@@ -53,4 +53,8 @@
 
 .modal__error {
   color: $status-error;
+}
+
+dl {
+  margin-bottom: 0;
 }
\ No newline at end of file