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/_NotificationBadge.pcss

@@ -39,7 +39,7 @@ limitations under the License.
             width: 8px;
             height: 8px;
             border-radius: 8px;
-            background-color: var(--cpd-color-text-primary);
+            background-color: var(--cpd-color-icon-primary);
 
             .mx_NotificationBadge_count {
                 display: none;
@@ -86,7 +86,8 @@ limitations under the License.
         .mx_NotificationBadge_count {
             font-size: $font-10px;
             line-height: $font-14px;
-            color: #fff; /* TODO: Variable */
+            font-weight: var(--cpd-font-weight-semibold);
+            color: var(--cpd-color-text-on-solid-primary);
         }
     }
 }