Accessibility fixes:

	- changed buttons to spans since not being used in forms
	- added aria roles to html elements
	- changed low contrast colors

Change-Id: I56e784b226baa7f9b24346446a0a023fcea633d4
Signed-off-by: Michael Davis <michael.s.davis@ibm.com>
diff --git a/app/common/styles/components/form-elements.scss b/app/common/styles/components/form-elements.scss
index 767d76f..5c87a35 100644
--- a/app/common/styles/components/form-elements.scss
+++ b/app/common/styles/components/form-elements.scss
@@ -112,6 +112,7 @@
   height: 20px;
   background: $white;
   border: 1px solid $lightbg__grey;
+  font-size: 0;
 }
 
 /* Hover and focus states */