PLT-3466 E10: Add announcement bar feature (#6509)

* E10 - Add announcement bar feature

* Updates per feedback

* Add component tests and snapshots

* Update snapshots

* Updating color picker UI (#6543)

* Add class to body tag when banner is not dismissable and clean up localstorage items when banner changes

* Fixing links (#6544)

* Updating UI for fixed error bar (#6552)

* Truncating text on fixed banner (#6561)

* Plt 3466 - Error bar link states (#6577)

* Updating error bar hover state

* Updating error bar link states

webapp/sass/layout/_sidebar-left.scss

@@ -8,6 +8,10 @@
     width: 220px;
     z-index: 5;
 
+    .error-bar--fixed & {
+        height: calc(100% - 22px);
+    }
+
     &.sidebar--padded {
         padding-top: 44px;
     }

webapp/sass/layout/_sidebar-right.scss

@@ -10,6 +10,10 @@
     width: 400px;
     z-index: 8;
 
+    .error-bar--fixed & {
+        height: calc(100% - 22px);
+    }
+
     &.webrtc {
         z-index: 5;
     }
@@ -85,8 +89,8 @@
                 @include opacity(.55);
                 position: absolute;
                 top: -25px;
-          }
-       }
+            }
+        }
     }
 
     .help__format-text {