Refine the colors of some more components (#12343)

* Refine the colors of some more components

This is a reintroduction of https://github.com/matrix-org/matrix-react-sdk/pull/12255, and should be the last part of the Compound color refinement work (https://github.com/element-hq/element-web/issues/26992). I've updated the following components to reflect design decisions (https://www.figma.com/file/pqhlirZFEwEp5XpudSbiia/Theming-Web-templates?type=design&node-id=80-60219&mode=design&t=mjqwylUie1vRwzOV-0) that will help them fit in better with the new design system:

- Message bubbles
- Pills
- Sent indicators
- Jump to bottom/unread buttons
- Composer placeholder
- Notification badges
- Room sublists
- Verification shields
- Date separators
- Tooltips

Closes https://github.com/element-hq/element-web/issues/22122

* Update some screenshots

res/css/views/rooms/_E2EIcon.pcss

@@ -37,15 +37,6 @@ limitations under the License.
     }
 }
 
-/* white infill for the transparency */
-.mx_E2EIcon::before {
-    background-color: #ffffff;
-    mask-image: url("$(res)/img/e2e/normal.svg");
-    mask-repeat: no-repeat;
-    mask-position: center;
-    mask-size: 80%;
-}
-
 /* transparent-looking border surrounding the shield for when overlain over avatars */
 .mx_E2EIcon_bordered {
     mask-image: url("$(res)/img/e2e/normal.svg");
@@ -59,6 +50,7 @@ limitations under the License.
     /* shrink the infill of the badge */
     &::before {
         mask-size: 60%;
+        background: var(--cpd-color-bg-canvas-default);
     }
 }
 
@@ -69,7 +61,7 @@ limitations under the License.
 
 .mx_E2EIcon_normal::after {
     mask-image: url("$(res)/img/e2e/normal.svg");
-    background-color: $header-panel-text-primary-color;
+    background-color: var(--cpd-color-icon-tertiary);
 }
 
 .mx_E2EIcon_verified::after {